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Sigma-Aldrich

Sodium dodecyl sulfate

for biochemistry and surfactant tests

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Synonym(s):
Dodecyl sulfate sodium salt, Lauryl sulfate sodium salt, SDS, Dodecyl sodium sulfate
Empirical Formula (Hill Notation):
C12H25NaO4S
CAS Number:
Molecular Weight:
288.38
MDL number:
EC Index Number:
205-788-1

Quality Level

potency

1427 mg/kg LD50, oral (Rat)
>2000 mg/kg LD50, skin (Rabbit)

pH

6-9 (20 °C, 10 g/L in H2O)

mp

204-207 °C

transition temp

flash point >150 °C

solubility

>130 g/L

density

1.1 g/cm3 at 20 °C

bulk density

490‑560 kg/m3

storage temp.

15-25°C

InChI

1S/C12H26O4S.Na/c1-2-3-4-5-6-7-8-9-10-11-12-16-17(13,14)15;/h2-12H2,1H3,(H,13,14,15);/q;+1/p-1

InChI key

DBMJMQXJHONAFJ-UHFFFAOYSA-M

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71729L450975746
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transition temp

flash point >150 °C

transition temp

cloud point >100 °C

transition temp

cloud point >100 °C

transition temp

cloud point >100 °C(lit.)

solubility

>130 g/L

solubility

H2O: 0.1 M at 20 °C, clear, colorless

solubility

water: soluble

solubility

H2O: soluble 0.29 gm in 10ml, clear, colorless, H2O: 0.1 M at 20 °C, clear, colorless

density

1.1 g/cm3 at 20 °C

density

-

density

-

density

-

storage temp.

15-25°C

storage temp.

-

storage temp.

-

storage temp.

-

Quality Level

100

Quality Level

200

Quality Level

200

Quality Level

200

Analysis Note

Assay (two-phase titration): ≥ 99
Homologue purity C-12: ≥ 98
Identity (IR-spectrum): passes test
Solubility (Ethanol): passes test
Absorbance A (220-350 nm; 3 %; 1 cm; water): ≤ 0.10
Chloride (Cl): ≤ 0.01 %
Phosphate (PO₄): ≤ 0.0001 %
Heavy metals (as Pb): ≤ 0.0005 %
Water (according to Karl Fischer): ≤ 1

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Aquatic Chronic 3 - Eye Dam. 1 - Flam. Sol. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

4.1B - Flammable solid hazardous materials

WGK

WGK 2

Flash Point(F)

338.0 °F

Flash Point(C)

170 °C


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Protocols

Cell Lysis and Protein Extraction for Western Blotting

Protocol for sample preparation for cell lysis and efficient protein extraction from cultured tissues and cells for subsequent Western blotting.

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