Sodium 3,9-diethyltridecan-6-yl sulphate
Time: 2013-10-31 19:21:28
Sodium 3,9-diethyltridecan-6-yl sulphate
Synonyms
3,9-Diethyl-tridecyl-6-sulfate;
Sodium heptadecyl sulphate;
Category
Anionic Surfactant
>> Sulfate
>> Chain Alcohol Sulfate
>> Alkanol Sulfate
>> Branched Alkanol Sulfate
Chemical Numbering System
CASRN3282-85-7
EINECS221-925-8
Molecular Formula & Molecular Weight
Molecular Formula: C17H35NaO4S; C17H36O4S.Na
Molecular Weight: 358.51
Structure
Properties
Appearance    (1), solid; (2), liquid.
Solubility    soluble in water.
Stability    stable in alkali, weak acid and hard water; unstable in strong acid, hydrolyzed, reduced to alcohol.
Risk    Solid form: flammable material; irritation, irritation to skin, eye, respiratory. Harmful products of combustion are CO, CO2 and so on. Contact with strong oxidants, can cause to burn.
GHS (Rev.6) label:  
Animal Toxicity
Table 1 Animal toxicity values
guinea pig oral LD50
425mg/kg[1]
guinea pig skin LDLo
425mg/kg[1]
rabbit skin LD50
3.56mL/kg[1]
rat oral LD50
1430mg/kg[1]
Ecology    may be hazardous to environment. Water body should be given special attention.
Biodegradability    biodegradable.
Characteristics    excellent wetting, permeating, emulsifying, dispersing, solubilizing, cleansing abilities. Resistant to hard water.
Synthesis
Currently, sulfated reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfates.
Generally, 3,9-diethyl-6-tridecanol and sulfur trioxide react through reactor, then sodium hydroxide neutralizes, finally obtain product.
US patent 8,921,588 (Process for preparing sulfates and/or sulfonates in a micro-reaction system) presents a synthetic process. Conditions: mole ratio of sulfur trioxide and alcohols or other raw materials: 1:1; temperature: 30-60°C; reactor: falling film reactor.
US patent 6,060,443 (Mid-chain branched alkyl sulfate surfactants) also presents some synthesis processes of branched chain sulfate.
US patent 6,455,488 (Process of making alkyl sulfate granulates) describes the preparation of a particulate alkyl sulfate, but does not involve the synthesis process.
US patent US 6,331,645 (Process for preparing powdery alkyl sulfates) describes the preparation of a powdery alkyl sulfate, but does not involve the synthesis process.
Quality Standards & Test Methods
1. Physical and chemical indexes
Item
Physical and chemical indexes
Liquid
Actives, %, ≥
90.0
Test Methods
(1), Actives
GB/T 5173 Surface active agents and detergents-Determination of anionic-active matter by direct two-phase titration procedure
ISO 2271 Surface active agents -- Detergents -- Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure
2. Hazardous substances indexes
Item
Hazardous substances indexes
Solid
Heavy metals (as Pb), mg/Kg, ≤
20
As, mg/Kg, ≤
3
Test Methods
(1), Heavy metals (as Pb)
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30799 The test method of food detergents - Determination of heavy metals
(2), As
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30797 The test method of food detergents - Determination of total arsenic
3. Further explanation
(a), On physical and chemical indexes: firstly, shall be indicated carbon atom distribution; secondly, shall be indicated average molecular weight.
Major Uses
1. Typical applications
Use as wetting agent, permeating agent.
Use as emulsifying agent, dispersing agent.
Manufacturers
 
References
[1]: ChemIDplus. 3282-85-7, Sodium 3,9-diethyltridecan-6-yl sulphate
Update: 20170718(1);