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Stearic Acid
Stearic Acid

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In rubber industry: It used as vulcanization activator of rubber ploymer and latex, also softener.
In plastics industry: Pla

CAS No: 57-11-4

Molecular Weight: 284.48
Chemical Formula: CH3(CH2)16COOH

Appearance: White or yellowish-white powder.


Index: SA 800Type SA 400Type SA 200type

Acid number, mg/g: 198-218 203-218 205-210

Saponification number, mg/g: 200-220 205-220 206-211

Iodinevalue, g/100g: 8max 4max 2max

Freezing point, C: 52min 54min 54-57

Moisture%: 0.3max 0.3max 0.3max


Stearic acid is useful as an ingredient in making candles, plastics, dietary supplements, oil pastels and cosmetics, and for softening rubber. It is used to harden soaps, particularly those made with vegetable oil. It is also used as a parting compound when making plaster castings from a plaster piece mold or waste mold and when making the mold from a shellacked clay original. Esters of stearic acid with ethylene glycol, glycol stearate and glycol distearate, are used to produce a pearly effect in shampoos, soaps, and other cosmetic products. They are added to the product in molten form and allowed to crystalize under controlled conditions. In fireworks, stearic acid is often used to coat metal powders such as aluminium and iron. It is used along with simple sugar or corn syrup as a hardener in candies. It is used with zinc as zinc stereate as fanning powder for cards to deliver smooth fanning motion. Stearic acid is one of most commonly used lubricants during injection molding and pressing of ceramic powders.

Packaging: Packed in Woven bag lined with plastic film. 25kgs in each bag.

Storage: Keep dry! Keep from heat and moisture!


Index  200
Triple  Pressed
Double  Pressed
  Iodine  g/100g  < =  2.0  4.0  8.0
  Soap  Value  mg/g  206-211  203-214  193-220
  Acid  Value  mg/g  205-210  202-212  192-218
  Color    (Hazen)  < =  200  400  800
  Freezing  Point  54-57  > =54  > =52
  Water  content  %  < =  0.20  0.20  0.20
  Inorganic  acid  %< =  0.001  0.001  0.001

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