9004-57-3
Ethyl cellulose
CAS: 9004-57-3
Molecular Formula: C23H24N6O4
9004-57-3 - Names and Identifiers
| Name | Ethyl cellulose |
| Synonyms | aquacoat spt50cps aquacoatecd30 celluloseethyl Ethyl cellulose aquacoatecd30fmc Ethyl cellulose N-200 cellulose,triethylether |
| CAS | 9004-57-3 |
| EINECS | 618-384-9 |
9004-57-3 - Physico-chemical Properties
| Molecular Formula | C23H24N6O4 |
| Molar Mass | 448.47446 |
| Density | 1.14 g/mL at 25 °C (lit.) |
| Melting Point | 240-255 °C |
| Water Solubility | insoluble |
| Solubility | esters, aromatic hydrocarbons, alcohols and ketones: soluble |
| Appearance | White solid |
| Specific Gravity | 1.14 |
| Color | White to slightly yellow |
| Merck | 14,3781 |
| Storage Condition | 2-8°C |
| Sensitive | Easily absorbing moisture |
| Refractive Index | n20/D 1.47(lit.) |
| MDL | MFCD00131037 |
| Physical and Chemical Properties | Ethyl ester of cellulose. White to light gray diffuse paste, thermoplastic. It is unstable to heat, discoloration at high temperature (240 ℃) and loses its original physical and chemical properties. Commodity grade products should have a specified viscosity. The relative density is 1.07~1.18, the refractive index is 1.47, and the softening point is 100~130 ℃, which can form a tough film and maintain flexibility at low temperature. Can be mixed with resin, wax, oil, etc. Stable to alkali and dilute acid. The softening point and hygroscopicity decreased with the increase of ethoxy content. The ethoxy content of standard commodities is 47% ~ 48%. Almost insoluble in water, glycerol and propylene glycol, but soluble in certain organic solvents to varying degrees (depending on the ethoxy content). Ethyl cellulose with ethoxy content less than 46% ~ 48% is easily soluble in a mixture of tetrahydrofuran, methyl acetate, chloroform and aromatic hydrocarbon-ethanol. Ethoxy content greater than 46% ~ 48% is easily soluble in ethanol, methanol, toluene, chloroform and ethyl acetate. The litmus test of 5% suspension was neutral. |
| Use | Used as adhesive and wire paint |
9004-57-3 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - 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. |
| WGK Germany | 1 |
| RTECS | FJ5950500 |
| FLUKA BRAND F CODES | 3 |
| TSCA | Yes |
| HS Code | 39129000 |
9004-57-3 - Reference
| Reference Show more | 1. [IF=12.121] Shanshan Hu et al."A mussel-inspired film for adhesion to wet buccal tissue and efficient buccal drug delivery."Nat Commun. 2021 Mar;12(1):1-17 |
9004-57-3 - Nature
Open Data Verified Data
A white or yellowish, odorless, odorless, non-toxic particulate or powdered thermoplastic fiber ether. Melting point 165~185 ℃, softening temperature 135~155 ℃, high dielectric strength. Chemical stability, light, thermal stability. Soluble in commonly used organic solvents, insoluble in water and
Glycerol, with many resins and plasticizers are compatible. The resulting film or plastic has superior mechanical strength and toughness at higher or lower temperatures.
Last Update：2024-01-02 23:10:35
9004-57-3 - Preparation Method
Open Data Verified Data
ethyl cellulose EC is industrially prepared by etherification of alkali fibers using refined cotton as a raw material and ethyl chloride as an etherifying agent.
Last Update：2022-01-01 11:08:36
9004-57-3 - Trait
Authoritative Data Verified Data
- This product is white or white particles or powder; Odorless, tasteless.
- This product is soluble in toluene or ether, insoluble in water.
Last Update：2022-01-01 11:19:16
9004-57-3 - Standard
Authoritative Data Verified Data
This product is ethyl ether cellulose. The content of ethoxy groups (-OC2Hs) shall be 44.0% to 51.0% based on the dry product.
Last Update：2024-01-02 23:10:35
9004-57-3 - Introduction
Softening point 100-130 ℃. The solubility varies with the degree of substitution of hydroxyl groups in cellulose by ethoxy. It can be dissolved in most organic solvents, can be mixed with resin, oil wax and plasticizer, has no effect on alkali and dilute acid, and is insoluble in water.
Last Update：2022-10-16 17:29:50
9004-57-3 - Use
Open Data Verified Data
① ethyl cellulose has good toughness, good cold resistance, excellent impact strength below 0 ℃, and can work at -60~80 ℃ and 100% relative humidity, therefore, it is an excellent material for the manufacture of automobile and aircraft parts. (2) good chemical stability, resistance to strong alkali, weak alkali and dilute acid, can be made into the chemical industry with the pipeline and chemical equipment parts. (3) Good water resistance and electrical insulation, can manufacture electrical appliances, cable insulation materials and radio parts. (4) The film is good, the diaphragm is soft and elastic and transparent. (5) can be used in the coating industry.
Last Update：2022-01-01 11:08:37
9004-57-3 - Differential diagnosis
Authoritative Data Verified Data
- take 5 g of this product, add 100ml of ethanol-toluene (1: 4) solution, shake, the solution is a transparent yellowish solution, take the appropriate amount of the above solution, pour on the glass plate, after evaporation of the solution, a porous film is formed, which can be burned.
- The infrared absorption spectrum of this product should be consistent with that of the reference product (General rule 0402).
Last Update：2022-01-01 11:19:17
9004-57-3 - Safety
Open Data Verified Data
This product is non-toxic. The finished product is packed with Kraft three-in-one composite bag, lined with polyethylene film bag, with a net weight of 25kg per bag, or packaged according to user requirements. Storage should be placed in a clean, dry and ventilated warehouse to prevent sun exposure and away from heat sources. Transportation should be protected from the sun and rain.
Last Update：2022-01-01 11:08:37
9004-57-3 - Exam
Authoritative Data Verified Data
viscosity
Precision weighing this product 2. Add 50ml of ethanol-toluene (1*4) solution to the flask, shake until completely dissolved, and let stand for 8-10 hours, adjust the temperature to 25°C ± 0. Dynamic viscosity was measured at 1 ° C. (General rule 0633 first method, capillary tubes with different inner diameters were selected so that the outflow time was greater than 200 seconds). If the labeled viscosity is greater than or equal to lOmPa • s, the viscosity shall be 90 of the labeled viscosity. 0% ~ 1 1 0. 0%; The indicated viscosity is 6 ~ lOmPa. Between s, the viscosity should be 80.0% ~ 120.0% of the indicated viscosity; The indicated viscosity is less than or equal to 6mPa • s, the viscosity should be 75.0% ~ 140.0% of the indicated viscosity.pH
take 0_50g of this product, add 25.0 of water, shake for 15 minutes, dissolve it, filter it through No. 3 vertical melting funnel, take 10.0 of filtrate, add human phenolphthalein indicator solution 0. lm l and sodium hydroxide titration solution (0. 01mol/L)0. 50ml, the solution should be pink; Another filtrate 1 0.0m l, add methyl red indicator solution 0. lm l and hydrochloric acid titration solution (0.01mol/L)0.50, the solution should be red. Nitride take this product 0. 2 5G, add water 40 m l, boil, cool, add water to 50m l, shake, filter; Discard 10ml of initial filtrate, and take 10ml of secondary filtrate. 0 M l, checked according to law (General rule 0801), compared with the control solution made of standard sodium chloride solution 5.0ml, should not be more concentrated (0 .1%).
acetaldehyde
Take 3. O g of this product, put it in a 250ml plug Erlenmeyer flask, add 10 M l of water, plug and stir for 1 hour. After standing for 24 hours, filter and dilute with water to 10 0m l, shake well, take 5 m l accurately, and put it in a 25 m l measuring flask, add 5 m l of 0.05% methyl benzothiazolone hydrazone hydrochloride solution and heat in a 60°C water bath for 5 min. Add iron (III)-sulfamic acid solution (l g each of iron (III) and sulfamic acid, add 100ml water to dissolve) 2ml, 60°C water bath to continue heating for 5 minutes, cooling, diluted with water to the scale, shake, as a test solution; another precise amount of acetaldehyde control solution (precise weighing of acetaldehyde l.O g, dilute with isopropyl alcohol to 10 m l, shake well, take 5 m l precisely, put it in a 500ml measuring flask, dilute it with water until the scale, shake well, take 3 m l for precision measurement, put it in a 100ml measuring flask, dilute it to the scale with water, and shake it well. In use of new system) 5. 0ml, same operation method. The test solution should not be darker than the control solution (0.01%).
loss on drying
take this product, dry at 105°C for 2 hours, loss of weight shall not exceed 3.0% (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 remaining residue shall not exceed.
Heavy metals
The residue left under the item of ignition residue shall be taken and inspected according to law (General rule 08 2 1 second law), and shall not contain more than 20 parts per million of heavy metals. Arsenic salt take this product 0. 67G, add calcium hydroxide 1. 0g, mix, add water and stir evenly, after drying, first burn with small fire to charring, and then burn at 500 ~ Soi °C to make it ash completely, and let it cool, add hydrochloric acid 8 ra l and water 23ml, check according to law (General Principles 0822 The first law), should comply with the provisions (0.0003%).
Last Update：2022-01-01 11:19:18
9004-57-3 - Molding Process
Open Data Verified Data
ethyl cellulose plastic can be molded by die casting, pressing, extrusion and hot stretching.
Last Update：2022-01-01 11:08:36
9004-57-3 - Content determination
Authoritative Data Verified Data
The measurement was carried out according to the methoxy, ethoxy and hydroxypropoxy method (General 0712). If the second method (capacity method) is used, take an appropriate amount of this product (equivalent to ethoxy group 1 0 m g ) , Precision weighing, and control the oil temperature at 150~160°C, the heating time is extended to 1 to 2 hours, and the rest are operated in the same manner. Each 1 M l sodium thiosulfate titration solution (0. l r a o l/L) corresponds to 0. 7510mg of ethoxy groups.
Last Update：2022-01-01 11:19:18
9004-57-3 - Category
Authoritative Data Verified Data
pharmaceutical excipients, coating materials and release blockers.
Last Update：2022-01-01 11:19:19
9004-57-3 - Storage
Authoritative Data Verified Data
sealed storage.
Last Update：2022-01-01 11:19:19
9004-57-3 - Marking
Authoritative Data Verified Data
viscosity is indicated in units of mPa · s or Pa · s.
Last Update：2022-01-01 11:19:19
9004-57-3 - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| identification test | solubility practically insoluble in water, glycerol and propylene glycol. But it is soluble in some organic solvents in different degrees (depending on the content of ethoxy groups), and when the content of ethoxy groups is less than 46% ~ 48%, it is easily soluble in Tetrahydrofuran, methyl acetate, chloroform and aromatic hydrocarbon-ethanol mixture; ethoxy group content is greater than the above, soluble in ethanol, methanol, toluene, chloroform and ethyl acetate. According to the OT-42 method. Take 5g of sample, dissolve in 95g of toluene ethanol mixture (80:20,W/W), the solution should be stable, transparent, yellowish. Several milliliters of this solution were transferred to a test tube or a glass plate and left to evaporate, with subsequent clouding and thickening until the residue became a transparent film. The film was flammable. |
| content analysis | accurately weigh about 50mg of sample pre-dried at 105 ℃ for 2H, it was placed in a gelatin capsule of known weight and placed in a flask of a methoxyl device, and then measured by the method of GT-14. Each milliliter of 0.1mol/L sodium thiosulfate corresponds to 751 μg of ethoxy (-OC2 H5). |
| toxicity | ADI is not specified (FAO/WHO. 2001). Safe for use in food (FDA,§ 172.868,2000). |
| Use | tablets (mostly used for vitamins and inorganic salts); Binders for vitamin powder; Fillers; dilute pigments and other food additives used as adhesives and wire paints used in ink, coatings, adhesives, pharmaceuticals, cosmetics and food fields, also used as fillers, binders, etc. Ethyl cellulose is used in large quantities for coatings. It can also be used as the basic material of solid lubricant for metal workpiece stamping. In microcircuit printing, ethyl cellulose is used as a vehicle. In the radio industry, it is used as an advanced insulating material and in protective coatings as a cladding of special films, such as rocket propellants. It can be used as hot-melt adhesives and coatings for cables, paper, textiles, etc., and can also be used as insulation for extrusion lines and as a toughness enhancer for plastics. It can also be used for pigment grinding base, for printing ink, for molding plastic powder, for explosive fuze, and for vitamin formulation. It is used as a peelable protective layer against corrosion and damage of metal parts before use, and can also be used as a peelable coating to protect fragile glassware. In adhesives, textiles and fibers, medicine and food, and other industries, there are many uses. Industrial grade ethyl cellulose is used in coatings (gel-type coatings, hot melt coatings), inks (screen printing inks, gravure printing inks), adhesives, pigment pastes, etc. High-grade products are used in medicine, cosmetics and food, such as pharmaceutical tablet packaging materials, long-acting formulations with binders. |
| method of production | alkaline fibrils were prepared from refined pulp or Linter with sodium hydroxide. Alkaline cellulose is then reacted with ethyl chloride in an autoclave to replace all or a portion of the three hydroxyl groups in glucose with ethoxy groups. The reaction product was washed with hot water and dried to obtain ethyl cellulose. wood pulp or Kapok is prepared by alkali treatment and then ethylation of alkaline cellulose with ethyl chloride. Cellulose and ethanol are combined in the presence of a dehydrating agent. |
| spontaneous combustion temperature | 698 ° F. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:41:03
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