Sodium dodecyl sulfate , Molecular biology grade, ≥98.5%(GC) , 151-21-3

Synonym(s):
SDS;Sodium lauryl sulfate;Dodecyl sodium sulfate;Dodecyl sulfate sodium salt;Lauryl sulfate sodium salt

CAS NO.：151-21-3

Empirical Formula: C12H25NaO4S

Molecular Weight: 288.38

MDL number: MFCD00036175

EINECS: 205-788-1

PRODUCT Properties

• Melting point: 204-207 °C (lit.)
• Density: 1.03 g/mL at 20 °C
• FEMA: 4437 | SODIUM LAURYL SULFATE
• Flash point: >100°C
• storage temp.: 2-8°C
• solubility: H₂O: 0.1 M, clear to nearly clear, colorless to slightly yellow
• form: Powder or Crystals
• color: White to pale yellow
• PH: 6-9 (10g/l, H2O, 20℃)
• Odor: Slight fatty odour
• PH Range: 7.2
• Water Solubility: ca. 150 g/L (20 ºC)
• λmax: λ: 260 nm Amax: 0.3; λ: 280 nm Amax: 0.2
• Merck: 14,8636
• BRN: 3599286
• InChIKey: DBMJMQXJHONAFJ-UHFFFAOYSA-M
• LogP: 1.600

Description and Uses

Sodium dodecyl sulfate is an anionic surfactant, and is a typical representative of sulphate-based surfactant. It is abbreviated as SDS, and also known as AS, K12, coco alcohol sulfate, sodium lauryl sulfate and foaming agent. The commercial products are usually white to light yellow crystalline powder. It is non-toxic, slightly soluble in alcohol, insoluble in chloroform and ether, soluble in water, and has good anionic and nonionic complex compatibility. It has good emulsibility, foamability, and foaming, infiltrating, decontaminating and dispersing properties. It is abundant in foams and quickly biodegradable, and has solubility next only to fatty alcohol polyoxyethylene ether sodium sulphate (abbreviated as AES). It is not sensitive to alkali and hard water, but its stability is inferior to general sulfonate under acidic conditions and is close to AES. It is not favorable to exceed 95 °C upon long-term heating, and its irritation is at the middle level among surfactants, with an irritation index of 3.3 for a 10% solution, which is higher than AES and lower than sodium dodecyl benzene sulfonate (abbreviated as LAS). Toxicity LD50 is 1300mg/kg. There is no evidence that this product is carcinogenic, but high doses may indeed irritate the skin. However, in general sanitary products the concentration is limited when used as a forming agent, and is in line with national standards. So there is no need to concern.
Sodium dodecyl sulfate is a major component of detergent. It is usually used in the DNA extraction process to separate DNA after protein denaturation. It is often misread as sodium dodecyl sulfonate. It is widely used as a foaming agent in toothpaste, soap, shower gel, shampoo, detergent and cosmetics. 95% of personal care products and household cleaning products contain sodium lauryl sulfate.
The above information is edited by the chemicalbook of Jin Yinxue.

Wetting agent, detergent, especially in the textile industry. Electrophoretic separation of proteins and lipids. Ingredient of toothpastes.

Safety

• Symbol(GHS): GHS05,GHS07
• Signal word: Danger
• Hazard statements: H302-H315-H318-H412
• Precautionary statements: P264-P273-P280-P301+P312-P302+P352-P305+P351+P338
• Hazard Codes: F,Xn,Xi
• Risk Statements: 36/37/38-36/38-22-11-21/22-42-41-20/21/22-37/38
• Safety Statements: 26-36/37-36/37/39-36-22-39
• RIDADR: UN 2926 4.1/PG 2
• WGK Germany: 2
• RTECS: WT1050000
• F: 3
• TSCA: Yes
• HazardClass: 4.1
• PackingGroup: III
• HS Code: 29209010
• Toxicity: LD50 orally in rats: 1288 mg/kg (Walker)