Physical and chemical properties of Sodium dodecyl sulfate SLS K12 CAS 151-21-3
Molecular formula: C12H25SO4Na
Molecular weight: 288.38
HLB value: 40, which is a hydrophilic surfactant.
Appearance and traits: white or cream-colored crystalline scales or powder.
It is made by sulfonating dodecyl alcohol (lauryl alcohol) with chlorosulfonic acid to produce sulfonic acid ester, and then bleaching it with hydrogen peroxide and sodium hydroxide.
pH: 7.5-9.5
Melting point: 204°C
Relative density (water = 1): 1.09
Solubility: easily soluble in hot water, soluble in water, soluble in hot ethanol, slightly soluble in alcohol, insoluble in chloroform and ether.
The CMC value of sodium lauryl sulfate at 298K is about 0.008 mol/L

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Names and Identifiers
Name Sodium dodecyl sulfate
Synonyms Sodium lauryl sulfate
sulfuric acid, didodecyl ester, sodium salt (1:1)

K12

Sodium Laurylsulfate
Sulfuric acid monododecyl ester sodium salt
sulfuric acid, dodecyl ester, sodium salt
Sulfuric acid, dodecyl ester, sodium salt (1:1)
Sulfuric acid, monododecyl ester, sodium salt
Natriumalkyl(C8-C20)-sulfate
CAS 151-21-3
12765-21-8
12738-53-3
1334-67-4
EINECS 205-788-1
InChI InChI=1/C24H50O4S.Na/c1-3-5-7-9-11-13-15-17-19-21-23-27-29(25,26)28-24-22-20-18-16-14-12-10-8-6-4-2;/h3-24H2,1-2H3;/q;+1

Physico-chemical Properties
Molecular Formula C12H25NaSO4
Molar Mass 288.378 g/mol
Melting Point 206℃
Solubility ca. 150 g/L (20℃)

Risk and Safety
Hazard Symbols F – Flammable
Flammable
Xn – Harmful
Harmful
Risk Codes R11 – Highly Flammable
R22 – Harmful if swallowed
R36/38 – Irritating to eyes and skin.
Safety Description S26 – In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36/37/39 – Wear suitable protective clothing, gloves and eye/face protection.
UN IDs UN 2926

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CAS#151-21-3, Sodium dodecyl sulfate SDS, C12H25NaSO4
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