CAS 57-11-4 Octadecanoic acid - Materials / Alfa Chemistry

NAVIGATION

Octadecanoic acid

PRICE INQUIRY

Catalog Number

ACM57114

CAS Number

57-11-4

Product Name

Octadecanoic acid

Structure

Category

Solubility Enhancing Reagents

Synonyms

Stearic acid

Description

Stearic acid is a white solid with a mild odor. Floats on water. (USCG, 1999);DryPowder; DryPowder, OtherSolid, Liquid; Liquid; OtherSolid; OtherSolid, Liquid; PelletsLargeCrystals; PelletsLargeCrystals, Liquid; PelletsLargeCrystals, WetSolid, OtherSolid; WetSolid, Liquid;Solid;Solid;WHITE CRYSTALS OR POWDER WITH CHARACTERISTIC ODOUR.;hard, white or faintly yellowish crystalline solid/tallow odour;White solid with a mild odor.

IUPAC Name

octadecanoic acid

Molecular Weight

284.48

Molecular Formula

C18H36O2

Canonical SMILES

CCCCCCCCCCCCCCCCCC(=O)O

InChI

InChI=1S/C18H36O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20/h2-17H2,1H3,(H,19,20)

InChI Key

QIQXTHQIDYTFRH-UHFFFAOYSA-N

Boiling Point

361 °C (lit.)

Melting Point

67-72 °C (lit.)

Flash Point

385 °F (NTP, 1992);113 °C (235 °F) - closed cup;385 °F (196 dec C) (closed cup);196 °C;385°F

Density

0.86 at 68 °F (USCG, 1999);0.9408 g/cu cm at 20 °C;Relative density (water = 1): 0.94-0.83;0.86

Solubility

1 to 10 mg/mL at 73° F (NTP, 1992);2.10e-06 M;0.000597 mg/mL at 25 °C;In water, 0.568 mg/L at 25 °C;In water, 0.597 mg/L at 25 °C;Insoluble in water;Slightly soluble in ethanol, benzene; soluble in acetone, chloroform, carbon disulfide;1 gram dissolves in 21 mL alcohol, 5 mL benzene, 2 mL chloroform, 26 mL acetone, 6 mL carbon tetrachloride, 3.4 mL carbon disulfide; also soluble in amyl acetate, toluene;Soluble in alcohol, ether, chloroform, carbon disulfide, carbon tetrachloride;0.000597 mg/mL;Solubility in water: none;practically insoluble in water; soluble in alcohol, ether, chloroform;1 g in 20 ml alcohol (in ethanol)

Appearance

Solid

Storage

Room temperature

Color/Form

Monoclinic leaflets from alcohol;White or slightly yellow crystal masses, or white to slightly yellow powder;Colorless, wax-like solid;White amorphous solid or leaflets

Complexity

202

Covalently-Bonded Unit Count

EC Number

200-313-4;273-087-8

Exact Mass

284.27153g/mol

Formal Charge

Heavy Atom Count

ICSC Number

0568

Log P

8.23 (LogP);8.23;log Kow = 8.23;8.23

MeSH Entry Terms

aluminum monostearate;aluminum tristearate;ammonium stearate;calcium stearate;magnesium stearate;octadecanoic acid;sodium stearate;stearic acid;zinc stearate

Monoisotopic Mass

284.27153g/mol

NSC Number

25956

Odor

Slight odor suggesting tallow

Other Experimental

Does not congeal below 54 °C. Slowly volatilizes at 90 to 100 °C;Index of refraction: 1.4299 at 80 °C;Vapor pressure = 1 mm Hg at 173.1 °C;White, crystalline solid; odorless or practically so; MP 33-35 °C; BP 224 °C. Ethyl stearate of commerce solidifies at 20-24 °C; BP 180 deg at 4 mm Hg. Insoluble in water; soluble in alcohol or ether /Stearic acid ethyl ester/;White crystals. MP 38-389 °C; BP 215 °C at 15 mm Hg. Insoluble in water, soluble in alcohol, ether /Stearic acid , methyl ester/;Hydroxyl radical reaction rate constant = 2.25X10-11 cu cm/molec-sec at 25 °C (est)

Refractive Index

Index of refraction: 1.6130 at 20 °C

Rotatable Bond Count

RTECS Number

WI2800000

Stability

Stable under recommended storage conditions.

UNII

4ELV7Z65AP

Vapor Density

9.8 (NTP, 1992) (Relative to Air);9.80 (Air = 1);9.8

Vapor Pressure

1 mm Hg at 344.7 °F ; 5 mm Hg at 408.2° F (NTP, 1992);7.22e-07 mmHg;7.22X10-7 mm Hg at 25 °C (ext);Vapor pressure, Pa at 174 °C: 133;1 mmHg at 344.7°F; 5 mmHg at 408.2°F

Viscosity

9.87 mPa.sec (cP) at 70 °C

XLogP3

7.4

MSDS

Download MSDS

COA

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Spec Sheet

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