Product
Stearic Acid
Stearic Acid (rubber grade) is a vegetable fatty acid used as a vulcanisation co-activator and processing aid in rubber, and as a lubricant in PVC.
- Grades / forms
- Triple & double pressed · Cosmetic grade · Rubber grade
- Documents
- TDS · SDS to view and download
Overview
Stearic acid is a saturated fatty acid produced mainly from palm and other vegetable oils by splitting and hydrogenation. Commercial stearic acid is a mixture of stearic (C18) and palmitic (C16) acids. Grades are classified by purity and by iodine value — a measure of unsaturation.
In rubber it reacts with zinc oxide to activate vulcanisation and acts as a processing aid that improves filler dispersion and mould release. In PVC it is an external lubricant. Higher-purity triple-pressed grades with very low iodine value go into cosmetics, candles and metal soaps.
Applications
- 1Vulcanisation co-activator in rubber
- 2Processing aid and dispersant in rubber compounds
- 3Lubricant in PVC processing
- 4Metal stearates such as zinc and calcium stearate
- 5Candles, textiles and cosmetics (higher grades)
Specification
- Appearance
- White fine beads
- Acid Value (mgKOH/g)
- 205-211
- Saponification Value (mgKOH/g)
- 206-211
- Iodine Value (mgKOH/g)
- 0.5 Max
- Titre (°C)
- 54-57
- Color Lovibond 5 ¼" Cell (R/Y)
- 0.5/5 Max
- C12:0 (%)
- 1.0 Max
- C14:0 (%)
- 2.0 Max
- C16:0 (%)
- 49-58
- C18:0 (%)
- 42-48
- C18:1 (%)
- 1 Max
Specification as stated on our Technical Data Sheet, which you can download below.
Documents
PDF documents from our quality records.
Packing & storage
Packing
- 25 kg PP or paper bags
- Jumbo bags
Storage & handling
Store cool and dry away from heat to prevent caking.
Enquire
Get a price for Stearic Acid
Send grade, quantity and destination port. Price, lead time and documents come back within one business day.
Request a quotation or call +91 97979 77958- Certificate of Analysis with every batch
- SDS in destination format
- Made to your specification
- Private label packing
Questions
Stearic Acid, answered.
Rubber-grade stearic acid has a higher iodine value and lower purity, which is sufficient for vulcanisation and processing. Triple-pressed stearic acid has a very low iodine value and higher purity, suited to cosmetics, candles and pharmaceuticals.
Iodine value measures unsaturation. A lower iodine value means fewer double bonds, better oxidative stability and a whiter, harder product. Rubber grades usually specify an iodine value of 8 or below.
Stearic acid is typically used at 1–2 parts per hundred rubber together with zinc oxide.
Yes. Cosmo Chemistry manufactures and exports Stearic Acid from Surat, Gujarat, India to more than 55 countries, for customers in the basic industrial chemicals, personal care & home care and plastic & rubber industries. Send your grade, quantity and destination port for a quotation within one business day.
Every shipment of Stearic Acid from Cosmo Chemistry includes a batch-specific Certificate of Analysis (COA) and Safety Data Sheet (SDS). Certificate of Origin, third-party pre-shipment inspection and destination-specific regulatory documentation are arranged on request.
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