Chemicals Name : polyvinyl alcohol, vinylalcohol polymer, poval, referred to as PVA
CAS No. :9002-89-5
Formula : [C2H4O] n
Molecular weight:  44.05
Structure:Non-toxic
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1,Security terms : S24/25 Avoid contact with skin and eyes Avoid contact with skin and eyes.
S26In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37Wear suitable protective clothing and gloves.
Wear suitable protective clothing and gloves.
S24/25Avoid contact with skin and eyes.
Avoid contact with skin and eyes.
S45In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
In case of accident or feel unwell, seek medical advice immediately ( if possible show the label ) .
Risk Phrases R23/24/25Toxic by inhalation, in contact with skin and if swallowed.
Inhalation , in contact with skin and if swallowed poisonous.
2, Technical indicators
Polyvinyl alcohol product standards (cp2010)
No.                      Index Name                    Standard
1                         Exterior                       White powder
2                      Viscosity                        3-70
3                     PH value                        4.5 ~ 6.5
4                   Loss on drying                  ≤ 5.0
5             Residue on ignition                 ≤ 0.5
6                    Acid value                        ≤ 3.0%
7                Alcoholysis                          85 ~ 89
8             Heavy Metal                       ≤ 10PPM
Polyvinyl alcohol product standards (USP25)
Low viscosity
No.                       Index Name                       Standard
1                              Exterior                         White powder
2                          Viscosity                           4.0 ~ 7.0
3                         PH value                           5-8
4       The average molecular weight        16000 to 20000
5                  Loss on drying                         ≤ 5.0
6               Residue on ignition                     ≤ 2.0
7           Water- insoluble impurities              ≤ 0.1%
8             The degree of hydrolysis                +
9              Organic volatile impurities              +
10                 Content                             85.0% ~ 115.0%
Medium viscosity
No.                              Index Name                       Standard
1                                      Exterior                    White powder
2                                    Viscosity                       21.0 ~ 33.0
3                                  PH value                              5-8
4                 The average molecular weight           110000 ~ 130000
5                           Loss on drying                           ≤ 5.0
6                       Residue on ignition                       ≤ 2.0
7                Water- insoluble impurities                 ≤ 0.1%
8              The degree of hydrolysis                    +
9         Organic volatile impurities                      +
10                  Content                               85.0% ~ 115.0%
High viscosity
No.                                 Index Name                                            Standard
1                                      Exterior                                             White powder
2                                    Viscosity                                               40.0 to 65.0
3                                  PH value                                                     5-8
4                   The average molecular weight                       180000 to 200000
5                            Loss on drying                                                  ≤ 5.0
6                  Residue on ignition                                                    ≤ 2.0
7               Water- insoluble impurities                                           ≤ 0.1%
8                  The degree of hydrolysis                                         +
9                 Organic volatile impurities                                        +
10                         Content                                                     85.0% ~ 115.0%
3, Pharmaceutical Grade
Pharmaceutical grade and specifications with EG , EG system uses. Pharmaceutical grade polyvinyl alcohol , polyvinyl alcohol level is different from the chemical industry , it is a very safe organic polymer , non-toxic to humans , no side effects, biocompatible , water-based gel , especially if he ‘s in medical in ophthalmology , wound dressings and artificial joints aspects are widely used in pharmaceutical polyvinyl alcohol film while the film , an artificial kidney film also has to use. Its security can be used to repair skin wounds , eye drops and eye products visible in general. Some models are also often used in cosmetics mask, cleanser , lotion and emulsion , is a commonly used security into film.

4,Risk
Health hazard : inhalation , ingestion or absorption through the skin harmful to eyes and skin

Stimulation.
Explosion hazard: The product is flammable , irritating.

5,Aid measures
Skin contact: Remove contaminated clothing, mobile water rinse .
Eye contact: Did eyelid, mobile water or saline. Doctor.
Inhalation: from the scene to fresh air. If breathing is difficult , give oxygen. Doctor.
Ingestion : drink plenty of water, induce vomiting . Doctor.
6, Fire-fighting measures
Hazardous characteristics : powder can form explosive mixtures with air , when it reaches a certain concentration, when Mars will explode. The thermal decomposition of flammable gases.
Hazardous combustion products : carbon monoxide, carbon dioxide.
Fire fighting methods : firefighters are required to wear gas masks, body wear firefighting suits , fire in the wind . Extinguishing Media: Water spray, foam, dry powder , carbon dioxide , sand.
7 leak handling
Emergency treatment: isolation leak contaminated areas, restricting access. Cut off the fire source . Recommended emergency personnel wearing a dust mask ( full cover ) , wear protective clothing. To avoid dust, carefully scan, bag placed transfer to a safe place . You can also rinse with plenty of water , wash water diluted into the wastewater system . If large spills, using plastic sheeting, canvas cover . Recycling or collection shipped to the waste disposal sites.
8, Handling
Handling Precautions: provide good natural ventilation.

The operator must go through specialized training , strict adherence to rules . Proposed operators wear self-absorption filter respirators , wearing chemical protective safety glasses , wear protective overalls on infiltration , wear rubber gloves. Away from fire , heat, workplace smoking . Use explosion-proof ventilation systems and equipment. Avoid generating dust . Avoid contact with oxidizing agents . Handling of light when light unloading , packaging and containers to prevent damage . Corresponding with the variety and quantity of fire equipment and emergency equipment leakage . Empty containers may be harmful residues .
Storage: Store in a cool , ventilated warehouse. Keep away from fire and heat. Oxidants should be stored separately and avoid mixing reservoir . Corresponding with the variety and quantity of fire equipment . Storage areas should be equipped with suitable material spill .

Polyvinyl alcohol has excellent film forming, , and properties. It is also resistant to oil, grease and . It is odorless and nontoxic. It has high tensile strength and flexibility, as well as high oxygen and aroma barrier properties. However these properties are dependent on , in other words, with higher humidity more water is absorbed. The water, which acts as a plasticiser, will then reduce its tensile strength, but increase its elongation and tear strength.Polyvinyl alcohol is fully degradable and is a quick dissolver. PVA has a melting point of 230-65533; 65533; C and 180190; 65533; 65533; C for the fully hydrolysed and partially hydrolysed grades. It decomposes rapidly above 20065533;65533; C as it can undergo at high temperatures.

Polyvinyl alcohol‘s use can prefect as follows:

1. Adhesive and thickener material in latex paints, paper coatings, hairsprays, shampoos and glues.

2. Textile agent

3. barrier in (PET) bottles.

4. for use as synthetic vessels in flow testing.

5. Movie and children’s play or slime when combined with

6. Feminine hygiene and adult incontinence products as a plastic backing sheet.

7. As a because materials such as do not stick to it.

8. As a water-soluble film useful for packaging.

9. As fiber reinforcement in concrete

10. As a surfactant for the formation of polymer encapsulated nanobeads

11. Used with polyvinyl acetate to make Elmer’s glue

12. Used in eye drops and hard solution as a lubricant.

13. Used in protective chemical-resistant gloves

14. Used as a for specimen collection, especially stool samples

15. When doped with iodine, PVA can be used to polarize light.

16. As an agent in medical procedures

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