Reported in EPA TSCA Inventory.
Sodium polyacrylate , its cas register number is 9003-04-7. It also can be called Polyacrylic acid sodium salt ; Poly(sodium acrylate) ; Propenoic acid homopolymer sodium salt ; PAAS .It is a faintly grey crystalline solid. It is a sodium salt of polyacrylic acid with the chemical formula [-CH2-CH(COONa)-]n and broad application in consumer products. It has the ability to absorb as much as 200 to 300 times its mass in water. Sodium polyacrylate is anionic polyelectrolytes with negatively charged carboxylic groups in the main chain.
Physical properties about Sodium polyacrylate are: (1)ACD/LogP: 0.279; (2)ACD/LogD (pH 5.5): -0.99; (3)ACD/LogD (pH 7.4): -2.77; (4)ACD/BCF (pH 5.5): 1.00; (5)ACD/BCF (pH 7.4): 1.00; (6)ACD/KOC (pH 5.5): 1.80; (7)ACD/KOC (pH 7.4): 1.00; (8)#H bond acceptors: 2; (9)#H bond donors: 1; (10)#Freely Rotating Bonds: 1; (11)Flash Point: 61.6 °C; (12)Enthalpy of Vaporization: 41.72 kJ/mol; (13)Boiling Point: 141 °C at 760 mmHg; (14)Vapour Pressure: 3.42 mmHg at 25°C
Preparation of Sodium polyacrylate: Its made by polymerising acrylic acid (usually as an emulsion polymer in water with emulsifiers and free radical cataylst such as sodium persulfate of hydrogen peroxide) and neutralising with sodium hydroxide.
Uses of Sodium polyacrylate:
1. Sodium polyacrylate is a chemical polymer that is widely used in a variety of consumer products for its ability to absorb several hundred times its mass in water. Sodium polyacrylate is made up of multiple chains of acrylate compounds that possess a positive anionic charge, which attracts water-based molecules to combine with it, making sodium polyacrylate a suber-absorbent compound.
2. Sodium polyacrylate is commonly used as a sequestering agent, or chelating agent, in many detergents. It has the ability to bind hard-water elements, such as magnesium, calcium, iron and zinc, to make the detergents work more effectively. Chelating agents neutralize the presence of heavy metals that may be found in water, dirt and other substances that can be found in your laundry, making the detergent more effective in cleaning and neutralizing odors in your clothes.
When you are using this chemical, please be cautious about it as the following:
1. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice;
2. Take off immediately all contaminated clothing;
3. After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer);
4. Do not empty into drains;
5. Never add water to this product;
6. Take precautionary measures against static discharges;
7. This material and its container must be disposed of in a safe way;
8. Wear suitable protective clothing;
You can still convert the following datas into molecular structure:
(1)SmilesC(C=C)(=O)[O-].[Na+];
The toxicity data is as follows:
Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
---|---|---|---|---|---|
rat | LD50 | oral | > 40gm/kg (40000mg/kg) | Proceedings of the Scientific Section of the Toilet Goods Association. Vol. 20, Pg. 16, 1953. |
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