EDTA disodium dihydrate
Synonyms
Disodium EDTA;
Acetic acid, (ethylenedinitrilo)tetra-, disodium salt, dihydrate;
Glycine, N,N'-1,2-ethanediylbis(N-(carboxymethyl)-, disodium salt, dihydrate;
Disodium edetate dihydrate;
Category
Zwitterionic Surfactant
> Nitrilo Acid Type
>> Aliphatic Nitrilo Acid and its Salts
Chemical Numbering System
CASRN: 6381-92-6
EINECS: N/A
Molecular Formula & Molecular Weight
Molecular Formula: C10H18N2Na2O10; C10H16N2O8.2Na.2H2O
Molecular Weight: 372.24
Structure
Properties
Appearance (1), white solid.
Solubility soluble in water.
Stability stable.
Risk Solid form: flammable material; irritation, irritation to skin, eye, respiratory system. Harmful products of combustion are CO, CO2, nitrogen oxides and so on. Contact with strong oxidants, can cause to burn.
GHS (Rev.10) label: 
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent chelating, dispersing, antistatic abilities.
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
95.0 |
Test Methods
(1), Actives
GB/T 13173 Surface active agents -- Detergents -- Testing methods
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, Product standards
(1), Chinese standards
(1a), GB/T 1401 Chemical reagent -- Ethylenediamine tetraacetic acid disodium salt
(1b), GB 1886.100 Food safety national standard -- Food additive -- Disodium ethylenediaminetetraacetate
(1c), GB 10734 Primary chemical -- Ethylenediamine tetraacetic acid disodium salt
(1d), GB 12593 Working chemical -- Ethylenediaminetetraacetic acid disodium salt
(1e), YY 0206 Pharmaceutical excipients -- Ethylenediaminetetraacetic acid disodium salt
(1f), Chinese Pharmacopoeia (2015 Edition) Disodium Edetate
4, 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, according to local regulations and standards.
Major Uses
1, Typical applications
Use as chelating agent, such as personal care products, industrial cleaning, household cleaning products, water treatment, textile, paper, heavy metals treatment, and so on.
2, Personal care products
Chelating agent, viscosity controlling agent in personal care products.
3, Materials
Buffering agent in color photographic materials.
4, Food
Use as food additive (stabilizer, coagulant, antioxidant, preservative, adsorbent, chelating agent).
5, Medicine
Pharmaceutical excipient, use as chelating agent. (This section is for reference only, should be implemented according to local Pharmacopoeia.)
Manufacturers
Update: 20140924(1); 20190506(2);