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Sigma-Aldrich

Sodium dodecyl sulfate

for synthesis

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

form

powder

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.

2-30°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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This Item
RDD021L4509RDD040
Sodium dodecyl sulfate ReagentPlus®, ≥98.5% (GC)

Sigma-Aldrich

L4509

Sodium dodecyl sulfate

potency

1427 mg/kg LD50, oral (Rat)

potency

-

potency

-

potency

-

pH

6-9 (20 °C, 10 g/L in H2O)

pH

-

pH

-

pH

-

mp

204-207 °C

mp

204-207 °C (lit.)

mp

204-207 °C (lit.)

mp

204-207 °C (lit.)

transition temp

flash point >150 °C

transition temp

-

transition temp

cloud point >100 °C

transition temp

cloud point >100 °C

solubility

>130 g/L

solubility

water: soluble 100 mg/mL (opalescent solution)

solubility

water: soluble

solubility

water: soluble

General description

Sodium dodecyl sulfate (SDS) is a conventional anionic surfactant. An amphiphilic surfactant consists of polar hydrophilic head groups and non-polar hydrophobic tail groups. Surfactants are characterized by their ability to form micelles, i.e., their ability to self-aggregate above a critical micelle concentration (CMC). Due to its amphiphilic nature, the surfactant is used as a detergent in industries. They are useful for cleaning, wetting, dispersing, emulsifying, foaming, and antifoaming.

Application

Sodium dodecyl sulfate used as a surfactant:
  • In the synthesis of SiO2/polystyrene nanocomposite particles by miniemulsion polymerization.
  • In the preparation of solid lipid NPs (SLNs) and poly(lactide-co-glycolide) NPs containing OA-Fe3O4 as CANs (composite antistatic NPs).

Analysis Note

Assay (Epton titration): ≥ 95.0 %
Identity (IR): passes test

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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