Octadecanoic acid (Stearic acid)

Stearic Acid, also known as Octadecanoic Acid or Cetylacetic Acid, is widely used in cosmetics, plastic plasticizers, release agents, stabilizers, surfactants, rubber vulcanization accelerators, waterproofing agents, polishing agents, metal soaps, mineral flotation agents, softening agents, pharmaceuticals, and other organic chemicals.

Basic Introduction
Chinese Name: Octadecanoic Acid, Stearic Acid
Chemical Name: Stearic Acid
INCI Name: Stearic Acid
CAS Registry Number: 57-11-4
EINECS Registry Number: 266-928-5
Molecular Formula: C18H36O2
Molecular Weight: 284.48
HS Code: 2915701000
Synonyms: Octadecanoic Acid, 18 Acid, Stearic Acid, Stearinic Acid, Cetylacetic Acid, Stearin, Tallow Acid, Octadecylic Acid, Octadecanoic Acid, C18 Acid, Stearic Acid Type 800, C18

Application Areas
1. Food Additives: Stearic acid and its salts are commonly used as food additives, primarily to enhance the aroma and texture of food. It is sometimes used as a base component for flavors in foods such as chocolate, candy, and biscuits. Its antimicrobial properties make it useful as a preservative in certain foods, extending their shelf life.
2. Chemical Industry: Stearic acid can be used to prepare various surfactants, such as sodium stearate and stearamide. These surfactants function as emulsifiers, detergents, and foaming agents in products like detergents and cleaners.
3. Pharmaceutical Manufacturing: In the pharmaceutical field, stearic acid is used to prepare certain drugs and drug carriers. It is also used in some topical medications for its antibacterial and anti-inflammatory effects. As a synthetic raw material, it is employed in the preparation of pharmaceutical intermediates and catalysts in synthesis processes.
4. Daily Chemical Industry: Stearic acid is one of the main components of soap, capable of producing rich lather and offering good cleansing power. It is also used in hair care products like shampoos. Its moisturizing properties make it an important ingredient in body washes and hand creams, helping to keep the skin hydrated. Stearic acid is also a common cosmetic ingredient used in the preparation of facial cleansers, skin creams, and other products for its lubricating and moisturizing effects.

Packaging Method
Kraft Bag

Stability and Storage Conditions
Store in a cool, well-ventilated warehouse. Keep away from fire and heat sources. Protect from direct sunlight. Keep containers sealed. Separate from oxidizers, acids, acid anhydrides, and acyl chlorides. Avoid mixed storage. Equip with appropriate types and quantities of fire-fighting equipment. The storage area should be equipped with leak emergency handling equipment and suitable containment materials.

Product Compliance
GB 1886.101
Color: White to pale yellow
State: Hard solid
Crystallization Point, °C: 54.5-69
Moisture, %: ≤0.2
Acid Value (as KOH) mg/g: 196-211
Unsaponifiable Matter, %: ≤1.5
Saponification Value (as KOH) mg/g: 197-212
Iodine Value (as I₂) g/100g: ≤7.0
Residue on Ignition, %: ≤0.1
Lead, mg/kg: ≤2.0

JP
Crystallization Point, °C: 56.0-72.0
Acid Value (as KOH) mg/g: 194-210
Iodine Value (as I₂) g/100g: ≤4.0
Residue on Ignition, %: ≤0.1
Heavy Metals, mg/kg: ≤20

EP
Crystallization Point, °C: 64-69
Acid Value (as KOH) mg/g: 194-212
Unsaponifiable Matter, %: ≤1.5
Saponification Value (as KOH) mg/g: 197-212
Iodine Value (as I₂) g/100g: ≤1.5
Stearic Acid, %: ≥90.0
Stearic Acid + Palmitic Acid, %: ≥96.0
Nickel, mg/kg: ≤1.0

USP
Crystallization Point, °C: ≥54
Iodine Value (as I₂) g/100g: ≤4.0
Stearic Acid, %: ≥40.0
Stearic Acid + Palmitic Acid, %: ≥90.0
Residue on Ignition, %: ≤0.1
Heavy Metals, mg/kg: ≤10