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Description

Additives · CAS 18639-67-3 · C18H36O2. UNII 4ELV7Z65AP. Boiling Point: 721 °F at 760 mmHg (NTP, 1992); Boiling Point: 383; Boiling Point: 371 °C.

Identification

CAS Registry Number	18639-67-3
PubChem CID	5281
Molecular formula	C18H36O2
IUPAC name	octadecanoic acid
UNII (FDA)	4ELV7Z65AP
FEMA number	3035
JECFA number	116

Computed Descriptors

Molecular Weight	284.5
XLogP3	7.4
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	16
Exact Mass	284.271530387
Monoisotopic Mass	284.271530387
Topological Polar Surface Area	37.3
Heavy Atom Count	20
Formal Charge	0

Physical & Chemical Properties

Boiling Point	721 °F at 760 mmHg (NTP, 1992)
Boiling Point	383
Boiling Point	371 °C
Boiling Point	721 °F
Melting Point	156.7 °F (NTP, 1992)
Melting Point	68.8
Melting Point	69.3 °C
Melting Point	68.8 °C
Melting Point	69-72 °C
Melting Point	156.7 °F

Physical description & handling notes

• Stearic acid is a white solid with a mild odor. Floats on water. (USCG, 1999)
• Liquid; Liquid; Other Solid; Dry Powder; Liquid; Other Solid; Dry Powder; Wet Solid; Other Solid; Large Crystals; Large Crystals; Other Solid
• White to yellow powder or wax-like substance; Stearates are salts of octadecanoic acid; [ACGIH]
• Colorless or white solid; [HSDB] White flakes; [MSDSonline]
• Solid
• WHITE CRYSTALS OR POWDER WITH CHARACTERISTIC ODOUR.

Regulatory Status

Regulatory & Food Contact	EU Flavoring substances FDA Substance added to food: EMULSIFIER OR EMULSIFIER SALT, FLAVORING AGENT OR ADJUVANT, FORMULATION AID, LUB FDA Cumulative Estimated Daily Intake (CEDI): FCS FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS Flavoring Agents FLAVOURING_AGENT: Flavouring Agent
GHS notification summary	68.3% (1405 / 2057)

GHS Hazard Classification

GHS notification summary	68.3% (1405 / 2057)
Reported hazard statements	H315 (25.1%), H301 (100%), H400 (100%)

Documented Uses

• Used in cosmetics, pharmaceuticals, food additives, waterproofing agents, plastic stabilizers, emulsifiers, and rubber lubricants and dusting agents; Stearic acid occurs naturally in human and animal fats and oils and in some vegetable oils, including cocoa oil. Stearic acid can be prepared from animal fat (triglyceride) by treating with water at high temperature, leading to hydrolysis of triglycerides, or by hydrogenation of unsaturated vegetable oils such as cottonseed oil. [ACGIH]
• Pulp and Paper Processing [Category: Industry]
• Textiles (Fiber & Fabric Manufacturing) [Category: Industry]
• Painting (Pigments, Binders, and Biocides) [Category: Paint]
• Plastic Composites Manufacturing [Category: Industry]
• Table: Reported uses (ppm): (Flavor and Extract Manufacturers' Association) [Table#3750]

Synonyms

stearic acid; Octadecanoic acid; 57-11-4; n-Octadecanoic acid; Stearophanic acid; Stearex Beads; 1-Heptadecanecarboxylic acid; Pearl stearic; Cetylacetic acid; Industrene R; Octadecansaeure; Stearinsaeure; Vanicol; Hydrofol Acid 150; Century 1240; Glycon DP

Frequently Asked Questions

What are the CAS number and molecular formula of Additives?

CAS 18639-67-3; molecular formula C18H36O2; molecular weight — g/mol.

What other names is Additives known by?

stearic acid, Octadecanoic acid, 57-11-4, n-Octadecanoic acid, Stearophanic acid, Stearex Beads.

What is the regulatory status of Additives?

Documented regulatory listings: EU Flavoring substances; FDA Substance added to food: EMULSIFIER OR EMULSIFIER SALT, FLAVORING AGENT OR ADJUVANT, FORMULATION AID, LUB; FDA Cumulative Estimated Daily Intake (CEDI): FCS.

Is Additives classified as hazardous?

68.3% of GHS notifications report no hazard classification (1405 of 2057).

What are the key physical properties of Additives?

Boiling Point: 721 °F at 760 mmHg (NTP, 1992); Boiling Point: 383; Boiling Point: 371 °C; Boiling Point: 721 °F.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.