Sodium C9-15 pareth sulfate
Time: 2013-06-03 02:08:29
Sodium C9-15 pareth sulfate
Synonyms
Sulfuric acid, alcohols C9-15 ethoxylated ester, sodium salt;
Polyethylene glycol C9-15 alkyl ether sulfate sodium salt;
Category
Anionic Surfactant
>> Sulfate
>> Alcohol Polyether Sulfate
>> Alcohol Polyoxyethylene Ether Sulfate
>> Linear Alkanol Polyoxyethylene Ether Sulfate
Chemical Numbering System
CASRNN/A
EINECSN/A
Molecular Formula & Molecular Weight
Molecular Formula: N/A; (C2H4O)n.C9H20O4S.Na - (C2H4O)n.C15H32O4S.Na (SciFinder Hill Rules)
Molecular Weight: N/A
Structure
 
R: C9-15.
Properties
Appearance    (1), paste; (2), liquid; (3), solid.
Odor    faint characteristic odor.
Solubility    soluble in water. The solubility increases with the increase of EO number.
Stability    stable in alkali, weak acid and hard water; unstable in strong acid.
Risk    Liquid (or paste) form: irritation, low irritation to skin, eye. Under the same hydrophobic base, with the increase of EO number, toxicity and irritation decrease, in general, the EO number is greater than 5, the decline is significantly smaller, tends to flat.
GHS (Rev.6) label:
Ecology    may be hazardous to environment. Water body should be given special attention.
Biodegradability    biodegradable.
Characteristics    excellent cleansing, foaming, emulsifying, wetting, dispersing, solubilizing, foam stabilizing, permeating abilities. Resistant to hard water. Performance is affected by EO number, such as: with the increase of EO number, cleansing capability decreases, solubilization capacity increases. Easily thicken, can provides good viscosity.
Note    (1), Products that has low content of 1,4-dioxane can be used in children cleaning products. Based on irritating judgment, usage should not exceed to 10%. In no tears formula of children shampoo, may be difficult to use as a primary surfactant.
(2), 1,4-dioxane generated during preparation: probable carcinogen. However, can be acceptable when concentration of 1,4-dioxane is less than 30ppm or less.
Synthesis
Currently, sulfated reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfates.
1. Synthesis of polyether
Obtain by polymerization reaction of C9-15 alkyl and ethylene oxide.
For further information, see:
US patent 4,223,163 Process for making ethoxylated fatty alcohols with narrow polyethoxy chain distribution; US patent 4,967,017 Alcohol ethoxylates of reduced EO content or residual PO content; US patent 5,069,817 Process for making polyoxyethylene surfactants with desirable low temperature behavior, etc.
2. Synthesis of sulfate
C9-15 alkyl alcohol polyoxyethylene ether 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 polyethers or other raw materials: 1:1; temperature: 30-60°C; reactor: falling film reactor.
Quality Standards & Test Methods
1. Physical and chemical indexes
Item
Physical and chemical indexes
High-enriched type
Low-enriched type
Actives, %, ≥
55.0 - 72.0
25.0
Unsulfated materials, %, ≤
2.50
0.3 - 1.0
Ethanol insoluble materials, %, ≤
0.25
/
NaCl, %, ≤
0.5
0.03 - 0.8
Na2SO4, %, ≤
1.0
0.16 - 0.8
pH (25°C, 10% solution)
7.0 - 9.5
7.0 - 9.5
1,4-Dioxane, ppm, ≤
30
30
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), Unsulfated materials
GB/T 11989 Anionic surface active agents - Determination of soluble matter content in light petroleum
ISO 894 Surface active agents -- Technical sodium primary alkylsulphates -- Methods of analysis
(3), Ethanol insoluble materials
GB/T 13173 Surface active agents - Detergents - Testing methods
(4), NaCl
GB/T 15963 Sodium lauryl sulfate
ISO 894 Surface active agents -- Technical sodium primary alkylsulphates -- Methods of analysis
(5), Na2SO4
GB/T 15963 Sodium lauryl sulfate
ISO 894 Surface active agents -- Technical sodium primary alkylsulphates -- Methods of analysis
(6), pH
GB/T 6368 Surface active agents - Determination of pH of aqueous solution - Potentiometric method
ISO 4316 Surface active agents -- Determination of pH of aqueous solutions -- Potentiometric method
(7), 1,4-Dioxane
GB/T 26388 Determination of dioxane residues in surfactants - Gas chromatographic method
ISO 17280 Surface active agents -- Determination of 1,4-dioxan residues in surfactants obtained from epoxyethane by gas chromatography
2. Hazardous substances indexes
Item
Hazardous substances indexes
High-enriched type
Low-enriched type
Heavy metals (as Pb), mg/Kg, ≤
20
20
As, mg/Kg, ≤
3
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.
(b), Used in cosmetics, should be test for harmful substances; or furtherly test for microorganisms.
(c), Generally, sodium C9-15 pareth sulfate and sodium laureth sulfate replace to use each other.
Major Uses
1. Typical applications
Use as cleansing agent.
Use as emulsifying agent, dispersing agent.
Use as foam stabilizing agent, foaming agent.
Use as solubilizing agent.
Use as wetting agent.
2. Personal care products
Cleansing agent, foaming agent in personal care products.
For example, main ingredient or auxiliary ingredient for cleansing agent, foaming agent in shampoo, hand sanitizer and other products.
Can provides good viscosity, foam and skin compatibility.
The products that contact with the skin for a long time, not recommended to use.
3. Household detergents
Main ingredient or auxiliary ingredient for cleansing agent, foaming agent in laundry detergent, hard surface detergent (for example: glass detergent) and other household products.
Particularly, suitable for the preparation of high bubble and light-duty detergents.
4. Industrial cleaning agents
Main ingredient or auxiliary ingredient for cleansing agent, foaming agent in car cleaning products, metal cleaning products and other industrial cleaning products.
Particularly, suitable for the preparation of high bubble detergents, for example:car cleaning agents.
5. Emulsion polymerization
Emulsifier, particle size controlling agent in emulsion polymerization.
6. Textile, leather
Use as emulsifier, foaming agent, wetting agent, cleansing agent, solubilizing agent.
7. Pets
Main ingredient or auxiliary ingredient for cleansing agent, foaming agent in shampoos and other pet products.
Product members
Sodium C9-15 pareth-2 sulfate;
Sodium C9-15 pareth-3 sulfate;
Sodium C9-15 pareth-4 sulfate;
Manufacturers
 
Update: 20131018(1); 20161210(2);