polyvinyl alcohol 100000
Poly(vinyl alcohol)
CAS: 9002-89-5
Molecular Formula: C2H4O
polyvinyl alcohol 100000 - Names and Identifiers
polyvinyl alcohol 100000 - Physico-chemical Properties
| Molecular Formula | C2H4O |
| Molar Mass | 44.05256 |
| Density | 1.080 g/cm3 |
| Melting Point | >300°C |
| Boling Point | -14.5°C (rough estimate) |
| Flash Point | 79°C |
| Water Solubility | soluble in hot water |
| Solubility | H2O: soluble (hot) |
| Appearance | White or milky white solid |
| Color | White to cream |
| Merck | 14,7585 |
| PH | 3.5-7.0 (40g/l, H2O, 20℃) |
| Storage Condition | Store below +30°C. |
| Stability | Stable. Combustible. Dust may form explosive mixtures with air. Incompatible with strong oxidizing agents. |
| Sensitive | Easily absorbing moisture |
| Refractive Index | 1.3810 (estimate) |
| MDL | MFCD00081922 |
| Physical and Chemical Properties | White to cream-colored granules or powder |
| Use | Used as warp size, emulsion stabilizer, rewet adhesive, water-soluble film, etc |
polyvinyl alcohol 100000 - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R36/38 - Irritating to eyes and skin. R39/23/24/25 - R68/20/21/22 - R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37 - Wear suitable protective clothing and gloves. 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. |
| WGK Germany | 1 |
| RTECS | TR8100000 |
| TSCA | Yes |
| HS Code | 39053000 |
| Toxicity | LD50 orally in Rabbit: > 20000 mg/kg |
polyvinyl alcohol 100000 - Upstream Downstream Industry
| Raw Materials | Acetic acid Methyl alcohol Methyl alcohol 2,2'-Azobis(2-methylpropionitrile) 2,2'-Azobis(2-methylpropionitrile) acetylene n-Propyl acetate n-Propyl acetate |
| Downstream Products | Poly(vinyl acetate) |
polyvinyl alcohol 100000 - Reference
| Reference Show more | 1. Li Ying, Fang Xubo, Zhou Jianzhong, etc. Study on preparation of AHLL nanoparticles [J]. Jiangsu Agricultural Sciences 2018 046(008):202-205. 2. Tang, Wang, Huang, Zhen, Dong, Wan, Qing, et al. Isolation and identification of dominant fungi from different fermented teas and comparison of their digestive enzyme activities [J]. Chinese Journal of microecology 2019(10). 3. Rich, Xie Xiaochen, Huang Zhendong, etc. Isolation, identification and activity analysis of digestive enzymes of Enterobacteriaceae culturable bacteria [J]. Chinese Journal of microecology, 2019(11). 4. Fang Qian, Xie Zhiling, Chen Hanhan, Li Jianwei, Pan Deng, Ding Xuezhi, Xia Liqiu, Tu Qiang, Zhang Youming. Cloning, expression and activity of lipase lipAB operon in defense against Pseudomonas [J]. Acta laser biology Sinica, 2018,27(05):442-450. 5. Yu Sijie, OH YOUNG JOO, Li Hongjun, KIM TAE SUK, He Zhifei, LEE sangyun, Li Shaobo, Li Minhan. Study on physical and chemical composition and antioxidant activity of liquid and solid enzymes [J]. Food and Fermentation Industry, 2020,46(13):85-91. 6. Xie Weijie, Zhang Yongping, Xu Jian. Screening Matrix formulation of indomethacin hydrophilic gel patch by uniform design [J]. China Pharmacy, 2017(10). 7. Zhang Yongping, Xu Jian, Xie Weijie. Optimization of matrix formulation and molding process of indomethacin hydrophilic gel patch by Central composite design-response surface methodology [J]. Medical leads, 2018, 037(005):593-599. 8. Tan Zhao-yan, Kang Ze, Huang Hao-nan, et al. Preparation of suspension Seed Coating Agent with 8% ENE · propyl · A and its control effect on Fusarium root rot of soybean [J]. Journal of Nuclear Agricultural Sciences, 2020v.34(05):56-64. 9. Zhibo, Tian Jianjun, Zhao Lihua, Zhang Kaiping, Jin Ye. Box-Behnken optimized culture conditions to improve lipase activity of lactic acid bacteria [J]. Chinese Journal of Food Science, 2020,20(10):124-133. 10. Li Xin, Liu Xin, Xu Cong Wu, Zhang Zhong, Wan Qing, Dong Qiyu, He Zhiwei, Liu Rui. Isolation, identification, drug resistance and digestive enzyme activity of culturable bacteria from digestive tract of wild East Asian Scorpion [J]. Chinese Journal of microecology, 2021,33(02):144-148+153. 11. Wang Jing, Zhu Junjun, Shen Bao De, Zhang Ting, Dai Bo, Zhu Ya Ning, Yuan Hailong. Preparation and quality evaluation of fast dissolving film of ginkgolide B New Nano suspension lyophilized powder [J]. Chinese Journal of Traditional Chinese Medicine, 2020,45(22):5504-5510. 12. Meng Xinyi, Li Hailong, Zhang Zhengjian, Gao Meng, thousands of deposits. Research on 3D printing friction nano-generator based on cellulose nanofibril ink [J]. Digital printing, 2021(01):48-54. 13. Zhang L, Qin H, Zeng F, Wu Z, Wu L, Zhao S, Xing D. A stimulated liquid-gas phase transition nanoprobe dedicated to enhance the microwave thermoacoustic imaging contrast of breast tumors. Nanoscale. 2020 Aug 6;12(30):16034-16040. doi: 10.1039/d0nr04441e. P 14. [IF=6.843] Zuxin Wang et al."Polyvinyl alcohol/chitosan composite hydrogels with sustained release of traditional Tibetan medicine for promoting chronic diabetic wound healing."Biomater Sci-Uk. 2021 May;9(10):3821-3829 15. [IF=6.529] Yan Chen et al."Polymer-based nanoparticles for chemo/gene-therapy: Evaluation its therapeutic efficacy and toxicity against colorectal carcinoma."Biomed Pharmacother. 2019 Oct;118:109257 16. [IF=3.935] Jinhui Lu et al."A time-resolved fluorescence lateral flow immunoassay for rapid and quantitative serodiagnosis of Brucella infection in humans."J Pharmaceut Biomed. 2021 Jun;200:114071 17. [IF=2.646] Rongguang Zhang et al."A novel degradable tricalcium silicate/calcium polyphosphate/polyvinyl alcohol organic-inorganic composite cement for bone filling:."J Biomater Appl. 0;(): 18. [IF=4.329] Mengxia Wang et al."Effect of Length of Cellulose Nanofibers on Mechanical Reinforcement of Polyvinyl Alcohol."Polymers-Basel. 2022 Jan;14(1):128 |
polyvinyl alcohol 100000 - Nature
Open Data Verified Data
white granules or powder. Soluble in water or capable of swelling only. Resistant to mineral oils, greases, lubricants and most organic solvents. Hygroscopic. Heat does not melt, about 150 degrees in the water loss of decomposition, color yellowing. Polyvinyl alcohol slowly degrades at 100 ℃ and rapidly degrades at 200 ℃. Polyvinyl alcohol is stable to light. Degradation in strong acids, softening or dissolution in weak acids and weak bases. Contact with strong oxidants can cause combustion and explosion. Dust and air can form explosive mixtures. The degree of polymerization and the degree of alcoholysis are two major factors that determine their physical properties.
Last Update：2024-01-02 23:10:35
polyvinyl alcohol 100000 - Hair-making
Open Data Verified Data
first, polyvinyl acetate is prepared by solution polymerization, and then the obtained polyvinyl acetate is hydrolyzed rapidly by using alkali metal or acid-free catalyst in methanol, ethanol or a mixture of ethanol and methyl acetate. Alcoholysis was performed to obtain polyvinyl alcohol.
Last Update：2022-01-01 10:06:45
polyvinyl alcohol 100000 - Standard
Authoritative Data Verified Data
This product is a product prepared by alcoholysis reaction of poly (vinyl acetate) in methanol solution with alkali solution. The molecular formula is (CH2CHOH)n (ch2chooch3) m, where m n represents the average degree of polymerization, m / n should be 0 to 0.35. The average molecular weight of this product should be 20000~150000.
Last Update：2024-01-02 23:10:35
polyvinyl alcohol 100000 - Trait
Authoritative Data Verified Data
- This product is white to yellowish powder or translucent particles; Odorless, tasteless.
- This product is dissolved in hot water, slightly soluble in ethanol, and almost insoluble in acetone.
acid value
Take 10g of this product, weigh it accurately, put it in a round bottom flask, add 250ml of water, heat and reflux for 30 minutes with constant stirring, and then cool with constant stirring.
precision
take 50ml, according to fat and fatty oil determination method (General 0713), acid value is not more than 3.0.
Last Update：2022-01-01 11:27:41
polyvinyl alcohol 100000 - Introduction
Softened and decomposed at 200 ℃. Commodities have different viscosities and characteristics due to the presence of various acetyl residues. Soluble in water, insoluble in petroleum solvents.
Last Update：2022-10-16 17:29:47
polyvinyl alcohol 100000 - Use
Open Data Verified Data
It is used as a dispersant and protective colloid for the polymerization of vinyl chloride, and can also be used for the manufacture of polyvinyl acetal and polyvinyl fiber. It is used as an adhesive for metal, rubber, leather, etc., a binding compound, a sizing agent for fabric, etc.
Last Update：2022-01-01 10:06:45
polyvinyl alcohol 100000 - Differential diagnosis
Authoritative Data Verified Data
take this product, according to infrared spectrophotometry (General 0402) determination, should be 2940cm-1±10cm-1 and 2920cm-1±10cm-1 wave number characteristic absorption peak.
Last Update：2022-01-01 11:27:41
polyvinyl alcohol 100000 - Safety
Open Data Verified Data
generally non-toxic materials, the dust on the respiratory tract irritation, inhalation, ingestion or skin contact with the substance can cause delayed reactions. Staff should be protected, touch the eyes and skin, should be immediately washed with flowing water, should be operated in a well ventilated environment.
Last Update：2022-01-01 10:06:46
polyvinyl alcohol 100000 - Exam
Authoritative Data Verified Data
viscosity
take the right amount of this product, precision weighing, add water to make a concentration of 3.8% (g/g ), 4.0% (g/g ), 4.2% gg) of the solution, it is heated in a water bath to dissolve and let it stand for cooling. Then it is placed in a constant temperature water bath of 20 ° C. ± 0.1 ° C., and the bubbles are removed and used as a test solution, which is measured according to law (General rule 0633 method III); separately, lg of each concentration solution was precisely weighed, placed in a flat weighing bottle previously dried to constant weight, and dried at 105-C for constant weight, and the actual concentration of the solution was calculated according to the measurement results.
The viscosity of the concentration of regression, according to the regression equation calculated concentration of 4. The dynamic viscosity of the test article at 0% should be 85.0%-115.0% of the labeled amount at 20°C ± 0_r c.
degree of hydrolysis
Take lg of this product for precision weighing, put it in a 250ml Erlenmeyer flask, add 35ml of 60% methanol solution, infiltrate the sample, add 3 drops of phenolphthalein indicator solution, adjust to Neutral with dilute hydrochloric acid or sodium hydroxide solution, add 25ml of 0.2mol/L sodium hydroxide solution accurately, heat and reflux for 1 hour, rinse the inner wall of the condenser and the lower part of the plug with 10ml of water, and cool, the remaining sodium hydroxide solution was titrated with hydrochloric acid titration solution (0.2mol/L) to the end point; The blank test was carried out by the same method.
acidity
Take 2g of this product, add 50ml of water, heat in a water bath to dissolve, cool, and determine according to law (General rule 0631). The pH should be between 4.5 and 6.5.
clarity and color of solution
Take 10g of this product, put it in a round-bottom flask, add 250ml of water, stir constantly, heat and reflux for 30 minutes to dissolve, and let it cool to room temperature; Check according to law (General rule 0901 and general rule 0902), the solution should be clear and colorless; If it is turbid, it should not be more concentrated compared with No. 1 turbidity standard solution (General 0902 first method); If it is colored, it shall not be deeper than the yellow or yellow-green standard colorimetric solution No. 1 (General rule 0901 method 1).
insoluble in water
take about 6g of this product, weigh it accurately, add water to make a solution with a concentration of 4.0%(g/g), place it in a water bath and fully stir and heat to dissolve it, while hot, it is filtered through a 110 mesh screen dried to constant weight at 100°C, the residue is washed twice with 25ml of water, and the residue is dried at 110°C for 1 hour, and the insoluble matter must not exceed 0.1%.
residual solvents: toluene and methyl acetate
take 0.6g of acetone, put it in a 1000ml measuring flask, dilute it with water to the scale, shake it well, and use it as an internal standard solution. Take about 0.5g of this product, weigh it precisely, add 2.0 of internal standard solution to a 20ml headspace bottle, shake well, seal, and use as a sample solution; Take methanol and methyl acetate about 0.125g each, in the same 50ml measuring flask, add the internal standard solution to dilute to the scale, shake well, accurately take another 2ml, put in the 20ml headspace bottle, seal, as a reference solution. Determined according to the residual solvent assay (General 0861 second method). With a DB-624 capillary column (6% cyanopropyl phenyl-94% dimethyl polysiloxane 0.530mm m X X 3.OOpm) is a chromatographic column; The inlet temperature is 200°C, the detector temperature is 250°C; The temperature is programmed to the initial temperature of 40°C, held for 8 minutes, and the temperature is increased to 150°C at 10°C per minute, hold for 2 min. The bottle was headspace, the equilibration temperature was 80°C, and the equilibration time was 30 minutes. Take the reference solution into the headspace, the peak sequence is methanol, acetone, methyl acetate, the separation degree of each component peak should meet the requirements. The test solution and the reference solution were sampled by Headspace injection, and the chromatograms were recorded. The content of methanol and methyl acetate shall not be more than 1.0% calculated by peak area according to internal standard method.
loss on drying
take this product, dry to constant weight at 105°C, and lose no more than 5 .0% of weight (General rule 0831).
ignition residue
take l.Og of this product and check it according to law (General rule 0841). The residue left shall not exceed 0.5%.
Heavy metals
take the residue left under the item of ignition residue of this product and check it according to law (General Principles 0821 second law). The heavy metal content shall not exceed 10 parts per million.
arsenic salt
take this product l. Og, add calcium hydroxide l. Og, mix, add a small amount of water, stir evenly, after drying, first burn with small fire to charring, then burn at 500~600°C to completely Ash, cool, add hydrochloric acid 5ml and water 23ML, according to the law inspection (General Principles 0822 The first law), should comply with the provisions (O. 0002%).
Last Update：2022-01-01 11:27:43
polyvinyl alcohol 100000 - Category
Authoritative Data Verified Data
pharmaceutical excipients, film-forming materials and suspending agents.
Last Update：2022-01-01 11:27:43
polyvinyl alcohol 100000 - Storage
Authoritative Data Verified Data
sealed storage.
Last Update：2022-01-01 11:27:43
polyvinyl alcohol 100000 - Marking
Authoritative Data Verified Data
The viscosity is indicated in mPa .s or Pa. s.
Last Update：2022-01-01 11:27:43
polyvinyl alcohol 100000 - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| (IARC) carcinogen classification | 3 (Vol. 19, Sup 7) 1987 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | polyvinyl alcohol is a solid that can be in the form of white powder, Flake or flocculent. The glass transition temperature was 60 to 85 °c. Polyvinyl alcohol contains many alcohol groups, has polarity, and can form hydrogen bonds with water, so it can be dissolved in polar water. Polyvinyl alcohol is also soluble in hot hydroxy-containing solvents such as glycerol, phenol, etc., insoluble in methanol, benzene, acetone, gasoline and other general organic solvents. |
| classification | According to the degree of polymerization can be divided into ultra high degree of polymerization (molecular weight 25~300,000), high degree of polymerization (molecular weight 17~220,000), medium degree of polymerization (molecular weight 12 to 150,000) and low degree of polymerization (molecular weight 2.5 to 35,000). The alcoholysis degree generally has complete alcoholysis (alcoholysis degree 98 ~ 100%), partial alcoholysis (alcoholysis degree 87 ~ 89%) and alcoholysis degree 78% three. In the product grade, the number of thousands and hundreds of digits of the degree of polymerization is usually put in front, and the degree of alcoholysis is put behind. For example, polyvinyl alcohol 17-99 indicates that the degree of polymerization is 1.7k and the degree of alcoholysis is 99%. |
| Application | polyvinyl alcohol (PVA) is a widely used water-soluble polymer, PVA can quickly dissolve in water, form a stable colloid, the performance between plastic and rubber, in addition to the fiber raw materials, is also widely used in the production of coatings, adhesives, paper processing agents, emulsifiers, dispersants, films and other products, applications throughout the textile, food, medicine, construction, wood processing, paper, printing, agriculture, iron and steel, polymer chemical and other industries. |
| function | PVA polymer powder is particularly suitable for use as an additive for building mortar, can improve the flexibility of cement mortar, water retention, improve mortar adhesion. In addition, the friction of the mortar can be reduced, thereby enhancing the work efficiency and quality. |
| uses | mainly used in textile industry warp sizing, fabric finishing agent, Vinylon fiber raw materials; Construction and decoration industry 107 glue, internal and external wall coatings, adhesives; Chemical industry used as polymeric emulsifier, dispersant and polyvinyl formal, acetal, butyral resin; Paper industry used as paper adhesives; Agriculture for soil amendments, pesticide adhesion synergist and polyvinyl alcohol film; Can also be used for daily cosmetics and high frequency quenching agent. It is mainly used in the manufacture of polyvinyl acetal, gasoline resistant pipeline, Vinylon fiber, emulsifier, dispersant, adhesive, fabric treatment agent, binding compound, packaging film and medical materials and products. adhesive and layering agent, fabric, paper sizing agent, thickening agent and stabilizer, emulsifier. used as warp size, emulsion stabilizer, rewet adhesive, water-soluble film, etc. used for the determination of arsenic in iron and steel reagent and emulsifier, also used in fabric, paper sizing and pharmaceutical industry mainly used as Vinylon raw materials, can also be made of film, leather adhesive, paper processing agent, fabric finishing agent, 107 latex, etc. widely used in industry, on the inner packaging of chemical products and civilian commodities used for Vinylon spinning and sizing, as raw materials for film, paper, adhesive and dispersant mainly used for making cloth, canvas, |
| production method | prepared by saponification of vinyl acetate |
| spontaneous combustion temperature | 450°C |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-06-13 11:30:12
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Raw Materials for polyvinyl alcohol 100000
Downstream Products for polyvinyl alcohol 100000