hydroxyl ethyl cellulose

hydroxyl ethyl cellulose - Names and Identifiers

hydroxyl ethyl cellulose - Physico-chemical Properties

Molecular Formula	C29H52O21
Density	0.75g/mLat 25°C(lit.)
Melting Point	288-290°C (dec.)
Water Solubility	almost transparency
Solubility	H2O: ≤5wt. % at20°C
Appearance	powder
Color	Light brown powder
Odor	Odorless
Merck	14,4673
PH	pH(20g/l,25℃) : 5.0～8.0
Storage Condition	2-8°C
Stability	Stable. Incompatible with strong oxidizing agents, acid chlorides, acid anhydrides
Sensitive	Easily absorbing moisture
MDL	MFCD00072770
Physical and Chemical Properties	This product is white to light yellow fibrous or powdery solid, non-toxic, tasteless, soluble in water. Insoluble in general organic solvents. It has the properties of thickening, suspension, adhesion, emulsification, dispersion, and moisture retention. Solutions with different viscosity ranges can be prepared. It has exceptionally good salt solubility to the electrolyte.
Use	Used as surfactant, latex thickener, colloid protective agent, oil fracturing fluid and polystyrene and polyvinyl chloride dispersant

hydroxyl ethyl cellulose - Risk and Safety

Hazard Symbols	T - Toxic
Risk Codes	R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description	S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S24/25 - Avoid contact with skin and eyes. S22 - Do not breathe dust.
WGK Germany	3
RTECS	FJ5958000
FLUKA BRAND F CODES	3
HS Code	39123980
Toxicity	LDLo intravenous in women: 5100mg/kg/6D-

hydroxyl ethyl cellulose - Reference

Reference

1. Wang Shifan, Junzhi Li, Dong Liming, Zhu Wenyou, blocking Xihua. Synthesis and properties of carbon dots based on aspartic acid and cellulose [J]. Journal of Molecular Science, 2020,36(04):294-299.
2. Wang Shifan, Junzhi Li, Dong Liming, Zhu Wenyou, blocking Xihua. Synthesis and properties of carbon dots based on aspartic acid and cellulose [J]. Journal of Molecular Science, 2020,36(04):294-299.
3. Rongda Ye, Chao Zhang, Wanchun Sun, Xiao Ming Fang, Zheng Guo Zhang, Novel wall panels containing CaCl2 · 6H2O-Mg(NO3)2 · 6H2O/expanded graphite composites with different phase change temperatures for building energy savings, Energy and Buildings, Volume 176, 20
4. [IF = 11.301] Xue Gao et al."Electric power generation using paper materials."J Mater Chem A. 2019 Sep;7(36):20574-20578
5. [IF=4.952] Changhong Liu et al."Effects of hydroxyethyl cellulose and sodium alginate edible coating containing asparagus waste extract on postharvest quality of strawberry fruit."Lwt Food Sci Technol. 2021 Aug;148:111770

hydroxyl ethyl cellulose - Nature

Open Data Verified Data

white to light yellow fibrous or powdery solid. Non-toxic, tasteless. It is a non-ionic cellulose ether, which is soluble in cold water and hot water because it contains hydrophilic Hydroxyethyl in the molecule. The pH value of the aqueous solution is 6.5~8.5, which is stable to heat. HEC has different solubility depending on the degree of substitution (DS). Insoluble in most organic solvents. With thickening, suspension, adhesion, emulsification, dispersion, water retention and other properties, can be prepared in different viscosity range of the solution. It has extremely good salt solubility for dielectrics, and its aqueous solution is allowed to contain high concentrations of salts while being stable.

Last Update：2024-01-02 23:10:35

hydroxyl ethyl cellulose - Hair-making

Open Data Verified Data

The Linter or refined cotton pulp was soaked in 30% lye. After removal, pressing was performed. Then, the mixture was pulverized and reacted with pre-cooled ethylene oxide to obtain a crude Hydroxyethyl Cellulose. It is then washed with alcohol and neutralized by washing with acetic acid. Glyoxal was then added for cross-linking aging, followed by rapid washing with water. Finally, the centrifugal dehydration, drying, grinding, that is to obtain the finished product.

Last Update：2022-01-01 10:06:43

hydroxyl ethyl cellulose - Standard

Authoritative Data Verified Data

This product is prepared from alkaline cellulose and ethylene oxide (or 2-chloroethanol) by etherification reaction, and belongs to non-ionic soluble cellulose ethers.

Last Update：2024-01-02 23:10:35

hydroxyl ethyl cellulose - Trait

Authoritative Data Verified Data

This product is white or off-white or yellowish white powder or granules.
This product forms a colloidal solution in hot or cold water and is almost insoluble in acetone, ethanol or toluene.

viscosity

take 1% aqueous solution of this product, with rotary viscometer, No. 2 rotor 1 2 revolutions per minute, at 25°C 0. The viscosity shall be 0633 ~ 50% of the indicated value when it is determined according to law under the condition of 1°C (General rule 150% third method), or detected according to the indicated solution concentration and conditions.

Last Update：2022-01-01 11:25:20

hydroxyl ethyl cellulose - Introduction

Soluble in cold water and hot water, the pH of the aqueous solution is 6.5-8.5. Insoluble in organic solvents. Stable to heat.

Last Update：2022-10-16 17:29:50

hydroxyl ethyl cellulose - Use

Open Data Verified Data

It is mainly used as a surfactant, a colloid protective agent, an emulsion stabilizer for emulsion polymerization of vinyl chloride, vinyl acetate, etc., and a tackifier, dispersant, dispersion stabilizer, etc. of latex. It can also be used as sizing agent in textile industry, adhesion, thickening, emulsification, stabilization and other additives in electronics and light industry departments, and oil field water-based gel fracturing fluid in petroleum industry.

Last Update：2022-01-01 10:06:44

hydroxyl ethyl cellulose - Differential diagnosis

Authoritative Data Verified Data

take about lg of this product, add 100ml of water, stir to completely dissolve, as a colloidal solution, heated to 60°C, the solution should remain clear.
The solution lm l under identification (1) was poured onto a glass plate, and a thin film was formed after evaporation of water.
Take 10ml of the solution under identification (1), add dilute acetic acid 0 .3M l and 10% tannic acid solution 2. 5 m l, appear yellowish white flocculent precipitation, dissolved after adding dilute ammonia.
take 1ml of 0.05% aqueous solution of this product, add 5% phenol aqueous solution lm l, sulfuric acid 5m, shake, cool, the solution should be orange.

Last Update：2022-01-01 11:25:20

hydroxyl ethyl cellulose - Safety

Open Data Verified Data

safe and non-toxic, can be used as food additives. Avoid contact with the fire source, especially in the closed environment should avoid the formation of a large number of dust, to prevent explosive hazards.

Last Update：2022-01-01 10:06:44

hydroxyl ethyl cellulose - Exam

Authoritative Data Verified Data

pH

take about l g of this product, add 100ml of water, stir to completely dissolve, and determine according to law (General rule 06314? The value of 1 should be 6.0 to 8 .5.

nitride

take 0.5g of this product, add water 1 0 0 m l, stir to completely dissolve, take l 0 m l, and determine according to law (General rule 0801), compared with the control solution made of 5.0mL of standard gasification sodium solution, it should not be more concentrated (1 .0%).

preparation of nitrate test solution precision weighing

take 0 .5g of this product, put it in a 100ml measuring flask, add buffer solution, dilute it to the scale, and shake it well to obtain the test solution. Preparation of stock solution of standard solution potassium nitrate (0.2038g) was weighed precisely, then placed in a 250ml measuring flask, and buffer solution was added (potassium dihydrogen phosphate (135g) was added, and then dissolved with appropriate amount of water, force B lm o l/L sulfuric acid 5 0ml, diluted to 1000ml with water, shake well, take 8 0ml, dilute to 2000ml with water, shake well, then get) dissolve and dilute to the scale, shake, then get the stock solution of nitrate standard solution (containing n030.5 mg per l m).
Preparation of reference solution 1 (applicable to the test sample with viscosity not greater than 1000mP • s) take 10ml, 20ml and 40ml stock solutions of standard solution and put them in 100ml measuring flasks respectively, dilute to scale with buffer and shake to obtain. Preparation of reference solution 2 (applicable to test samples with viscosity greater than loomp • s) take lm l, 2M l and 4ml stock solutions of standard solution precisely and put them into 100ml measuring flasks respectively, dilute to scale with buffer and shake to obtain. For the determination, the reference solution 1 or the reference solution 2 was taken respectively, the nitrate selective electrode was used as the indicator electrode, the silver-gasified silver electric electrode was used as the reference electrode, and the potential (m V) was determined according to the law (General rule 0701), A E-lgC standard curve was obtained by linear regression of the logarithm of nitrate concentration C (lgC) with potential C (m V). The potential value was measured and the amount of nitrate in the test sample was calculated. According to the dry product, the viscosity of the test article not more than loomp • s shall not contain nitrate. 3. 0%; The test article with viscosity greater than loomp • s should not contain nitrate. 2%.

glyoxal

take this product l .O g, set up a test tube with a plug, add 1 0 m l of anhydrous ethanol accurately, plug, stir magnetically for 30 minutes, centrifuge, and take the supernatant 2. O m l, add 0 .4% methyl benzothiazolone hydrazone hydrochloride in 80% glacial acetic acid 5. O m l, shake, stand for 2 hours, the color of the solution and the control solution with glyoxal (take the appropriate amount of the calibrated glyoxal solution, dilute with absolute ethanol to make the control solution contained in 1 ml l) 2.0 ml instead of the supernatant should not be deeper (0.002%) than the control solution prepared by the method. Calibration of glyoxal solution 40% g of glyoxal solution (1.0) was precisely weighed, 20ml of 7% hydroxylamine hydrochloride solution and 50ml of water were added, and the mixture was shaken and allowed to stand for 30 minutes, add human methyl red mixed indicator (1% methyl red-0.02% methylene blue fermentation solution) lm l, titrate with sodium hydroxide (lm o l/L) to red to green, the titration results were corrected by blank test. Each l of sodium hydroxide titration solution corresponds to 29.02 mg of glyoxal (C2H20 2).

ethyl chloride

take l g of this product, weigh it precisely, place it in the top empty bottle, add 1 .0 m l of pure water precisely, seal it, shake it well, and use it as a test solution. The amount of ethylene oxide 3 0 0# is equivalent to 0. 25g ethylene oxide), containing 50ml of treated polyethylene glycol 400 (at 60°C, 1 .5-2. 5kPa rotary evaporation for 6 hours to remove volatile components) in a 100ml measuring flask, added before and after weighing, add the same solvent diluted to the scale, shake, as ethylene oxide control stock solution. The stock solution of l g of cold ethylene oxide reference substance is accurately weighed, placed in a 50ml measuring flask containing 40.0g of treated polyethylene glycol 40 0, and diluted to the scale with the same solvent. Accurately weigh 10G, place 50m ↑ of water containing 30M l, dilute to the scale with water, and prepare a reference solution (1) containing 10 liters of ethylene oxide per lm l; take l g of this product, precision weighing, top empty bottle, precision into the reference solution (1)0. lm l and water 0.9M l, sealed, shake, as a reference solution (2 ) ; Precision take the reference solution (1)0. lm l, top empty bottle, add freshly prepared 0. 001% acetaldehyde solution 0. lm l, as a system suitability test solution. Test according to Gas chromatography (General 0521). With polydimethylsiloxane as the fixing liquid, the starting temperature is 50°C, the temperature is maintained for 5 minutes, the temperature is raised to 180°C at a rate of 5°C per minute, and then the temperature is raised to 230T at a rate of 30X per minute;, maintain 5 minutes (can be adjusted according to the specific situation). The temperature of the injection port was 1 50°C, and the detector was a flame ionization detector, and the temperature was 250°C. The equilibrium temperature of the headspace bottle is 70T, the equilibrium time is 45 minutes, and the system applicability test solution is sampled by Headspace injection, the detection sensitivity was adjusted so that the peak height of the ethylene oxide peak and the acetaldehyde peak was about 15% of the full scale, and the degree of separation between the acetaldehyde peak and the ethylene oxide peak was not less than 2 .0. Sample solution and reference solution were taken respectively for Headspace
Injection, repeated injection at least 3 times. The relative standard deviation of the peak area of ethylene oxide should not exceed 15%. According to the standard plus person method, ethylene oxide shall not exceed 0001%.

calibration of ethylene oxide reference stock solution

Take 10 ml of anhydrous ethanol suspension of 50% gasified magnesium and make 20 m l of hydrochloric acid titration solution (0. lm o L/l) by precision addition of human ethanol, mix well and place overnight. Take 5g of the reference stock solution of ethylene oxide, weigh it precisely, put it in the above solution, place it for 30 minutes, and make potassium hydroxide titration solution (0. lm o l/L) titration, and the titration results with blank test correction, each lm l ethanol potassium hydroxide titration solution (0. lm o l/L) corresponds to 4-404mg of ethylene oxide, calculated, I .e.

ethylene glycol and diglycerol

take this product 0. l g, precision weighing, put in 25ml measuring flask, precision plus internal standard solution (take 1, 3-butanediol reference item 0.2g, put in 100ml measuring flask, add anhydrous ethanol to dissolve and dilute to the scale, and shake to obtain) lm l, add anhydrous ethanol to fully swell and dilute to the scale, shake, filter, take the continued filtrate as the test solution; another 0.2g of ethylene glycol and g of diethylene glycol were added into a 100ml measuring flask, dissolved with absolute ethanol and diluted to the mark, place it in a 100ml measuring flask, add 5 m l of internal standard solution precisely, dilute it to scale with absolute ethanol, shake well, take 2 m l and place it in a 50m measuring flask, dilute to the scale with absolute ethanol, shake, as a control solution. According to gas chromatography (General Rule 0 5 2 1 ) , with phenyl-polydimethylsiloxane (50 : 50) as stationary phase, the initial temperature is 60°C, maintain 5 minutes, rise to 1 0 0c at a rate of 10c per minute, then to 170 c at a rate of 4 c per minute, and finally to 27ox: at a rate of 10c per minute for 2 minutes. High pure nitrogen was used as the carrier gas. The inlet temperature is 2701C, the detector temperature is 2901C, calculated according to the internal standard method, containing ethylene glycol and diethylene glycol are not more than 0.01%.

loss on drying

take this product l.OOOg, dry at 105°C for 3 hours, loss of weight shall not exceed 10.0% (General rule 0831).

ignition residue

The l .O g of this product shall be taken for inspection according to law (General rule 0841), and the residue shall not exceed 5 .0%.

Heavy metals

The + residual Tong left under the ignition residue item shall be inspected according to law (General rule 0821, Law 2), and the heavy metal content shall not exceed 20 parts per million.

Last Update：2022-01-01 11:25:22

hydroxyl ethyl cellulose - Category

Authoritative Data Verified Data

pharmaceutical excipients, thickeners, film coating agents, stabilizers, adhesives and suspending agents.

Last Update：2022-01-01 11:25:22

hydroxyl ethyl cellulose - Storage

Authoritative Data Verified Data

sealed storage.

Last Update：2022-01-01 11:25:22

hydroxyl ethyl cellulose - Reference Information

EPA chemical substance information	information provided by: ofmpeb.epa.gov (external link)
trait	Hydroxyethyl Cellulose is a white or yellowish odorless, tasteless, flowable powder. Both soluble in cold water-soluble hot water, under normal circumstances in most organic solvents insoluble. The viscosity change is small in the pH range of 2-12, but the viscosity decreases beyond this range.
Use	Hydroxyethyl Cellulose is generally used as thickener, protective agent, adhesive, stabilizer and preparation of emulsion, gel, ointment, lotion, eye clearing agent, suppository and tablet additives, also used as hydrophilic gel, matrix material, preparation of matrix type sustained-release preparation, can also be used for food as a stabilizer and so on. This product is used for fracturing oil water-based gel fracturing fluid, polystyrene and polyvinyl chloride polymerization dispersant. Can also be used as paint industry latex thickener, electronic industry Humidity sensitive resistance, construction cement inhibitor and moisture retention agent. Glazing and toothpaste adhesives for the ceramic industry. It is also widely used in printing and dyeing, textile, paper making, medicine, health, food, cigarettes, pesticides and fire extinguishing agents. as a thickener and fluid loss reducer for water-based drilling fluid and completion fluid, the thickening effect is obvious in brine drilling fluid. It can also be used as a fluid loss additive for oil well cement. The gel may be crosslinked with a polyvalent metal ion. It is used as surfactant, colloid protective agent, emulsion stabilizer of vinyl chloride, vinyl acetate and other emulsions, and adhesion promoter, dispersant, dispersion stabilizer and the like of latex. Widely used in coating, fiber, dyeing, papermaking, cosmetics, pharmaceuticals, pesticides and so on. There are also many uses in the oil extraction and machinery industry. used as surfactant, latex thickener, colloid protective agent, petroleum fracturing fluid, polystyrene and polyvinyl chloride dispersant, etc. hydroxyethylcellulose has surface activity, thickening and, suspension, adhesion, emulsification, film formation, dispersion, water retention and protection.
thickener and binder	Hydroxyethyl Cellulose is a commonly used cellulose ether organic water-based ink thickener, belonging to water-soluble non-ionic compounds, it has good thickening ability for water, can be degraded by oxygen, acid and enzyme, and can be crosslinked by Cu2 under alkaline conditions. It is stable to heat, does not appear gelation during heating, does not precipitate under acidic conditions, has good film-forming property, and its aqueous solution can be made into a transparent film, it can be formed by the action of alkaline cellulose and ethylene oxide, and has the properties of thickening, emulsification, adhesion, suspension, film formation, moisture retention and protective colloid. The function of the thickener in the aqueous ink is to thicken. The viscosity of the ink added with the thickener increases, which can improve the physical and chemical stability of the ink. Due to the increase of viscosity, the rheological property of the ink can be controlled during printing, increases the storage stability of aqueous inks. The thickener is a cellulose-based substance and/or a polyvinyl alcohol-based substance. The cellulosic substance may be one or more of methyl cellulose, ethyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose, hydroxypropyl cellulose, Hydroxyethyl Cellulose and hydroxypropyl methyl cellulose; the polyvinyl alcohol-based material may be one or more of polyethylene 400, 600, 800, 1000, 1600, 2000, 4000, 6000.
range of use	according to national standards, the recommended dosage is 1‰ to 3.
production method	alkali cellulose is a kind of natural polymer, each fiber base ring contains three hydroxyl groups, the most active hydroxyl groups react to produce Hydroxyethyl Cellulose. The raw cotton linter or refined meal pulp was soaked in 30% liquid alkali, and extracted and pressed after half an hour. The crushing was carried out by pressing to 1:2.8 of the alkaline water-containing cases. The crushed alkali cellulose is put into the reaction kettle, closed, vacuumed, filled with nitrogen, and the air inside the kettle is replaced by repeated vacuum and nitrogen filling. The pre-cooled ethylene oxide liquid was pressed into the reaction vessel, and the reaction vessel jacket was introduced into the cooling water to control the reaction at about 25 ℃ for 2H to obtain the crude Hydroxyethyl Cellulose. The crude product was washed with alcohol, neutralized to pH4-6 with acetic acid, and aged with glyoxal. It was then washed with water, centrifuged, dried, and pulverized to give Hydroxyethyl Cellulose. Raw material consumption (kg/t) cotton linter or low meal pulp 730-780 liquid alkali (30%) 2400 ethylene oxide 900 alcohol (95%) 4500 acetic acid 240 glyoxal (40%) 100-300 The raw material cotton linter or refined meal pulp is soaked in 30% alkali solution, taken out after half an hour, and pressed. The mixture was pressed to a ratio of alkaline water of 1: 2.8, and transferred to a pulverizing apparatus for pulverization. The crushed alkali fiber was put into the reaction kettle. Sealed vacuum, nitrogen. After the air in the kettle was replaced with nitrogen gas, the pre-cooled ethylene oxide liquid was forced into the autoclave. The reaction was controlled under cooling at 25 °c for 2 h to obtain crude Hydroxyethyl Cellulose. The crude product was washed with alcohol and adjusted to pH 4-6 by adding acetic acid. Then glyoxal cross-linking aging, washing with water quickly, finally centrifugal drying, grinding, to obtain low salt Hydroxyethyl Cellulose.
spontaneous combustion temperature	725 ° F.
toxic substance data	information provided by: pubchem.ncbi.nlm.nih.gov (external link)

Last Update：2024-04-09 21:54:55

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Name	Hetastarch
Synonyms	HEC bl15 ah15 Natrosol cellosize Hetastarch Natrosol LR Natrosol L 250 Natrosol 240JR Natrosol 250 M Natrosol 250 H Natrosol 250 HHR aw15(polysaccharide) aw15[polysaccharide] Hydroxyethyl Cellulose hydroxyl ethyl cellulose 2-hydroxyethylcelluloseether Hydroxyethyl ether cellulose Hydroxyethyl cellulose ether The blood coHydroxyethyl cellulose etherngeals the appearance board 5-[6-[[3,4-dihydroxy-6-(hydroxymethyl)-5-methoxyoxan-2-yl]oxymethyl]-3,4-dihydroxy-5-[4-hydroxy-3-(2-hydroxyethoxy)-6-(hydroxymethyl)-5-methoxyoxan-2-yl]oxyoxan-2-yl]oxy-6-(hydroxymethyl)-2-methyloxane-3,4-diol
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Molecular Formula: C29H52O21

hydroxyl ethyl cellulose - Names and Identifiers

hydroxyl ethyl cellulose - Physico-chemical Properties

hydroxyl ethyl cellulose - Risk and Safety

hydroxyl ethyl cellulose - Reference

hydroxyl ethyl cellulose - Nature

Open Data Verified Data

hydroxyl ethyl cellulose - Hair-making

Open Data Verified Data

hydroxyl ethyl cellulose - Standard

Authoritative Data Verified Data

hydroxyl ethyl cellulose - Trait

Authoritative Data Verified Data

viscosity

hydroxyl ethyl cellulose - Introduction

hydroxyl ethyl cellulose - Use

Open Data Verified Data

hydroxyl ethyl cellulose - Differential diagnosis

Authoritative Data Verified Data

hydroxyl ethyl cellulose - Safety

Open Data Verified Data

hydroxyl ethyl cellulose - Exam

Authoritative Data Verified Data

pH

nitride

preparation of nitrate test solution precision weighing

glyoxal

ethyl chloride

calibration of ethylene oxide reference stock solution

ethylene glycol and diglycerol

loss on drying

ignition residue

Heavy metals

hydroxyl ethyl cellulose - Category

Authoritative Data Verified Data

hydroxyl ethyl cellulose - Storage

Authoritative Data Verified Data

hydroxyl ethyl cellulose - Reference Information

Supplier List

hydroxyl ethyl cellulose