Sodium benzoate
Synonyms
Benzoic acid, sodium salt；
Benzoic acid, sodium salt (1:1);
Category
Anionic Surfactant
> Carboxylate
>> Cyclic Carboxylate
>>> Aryl Carboxylate
>>>> Benzoate
Chemical Numbering System
CAS: 532-32-1
EINECS: 208-534-8
Molecular Formula & Molecular Weight
Molecular Formula: C7H5NaO2; C7H6O2.Na
Molecular Weight: 144.10
Structure
Properties
Appearance (1), 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 and so on. Contact with strong oxidants, can cause to burn.
GHS label: 
Animal Toxicity
Table 1 Animal toxicity values
|
dog oral LD50 |
2000mg/kg[1] |
|
frog subcutaneous LDLo |
100mg/kg[1] |
|
guinea pig intraperitoneal LDLo |
1400mg/kg[1] |
|
guinea pig subcutaneous LDLo |
1000mg/kg[1] |
|
mouse intramuscular LD50 |
2306mg/kg[1] |
|
mouse intravenous LD50 |
1440mg/kg[1] |
|
mouse oral LD50 |
1600mg/kg[1] |
|
rabbit oral LD50 |
2000mg/kg[1] |
|
rabbit subcutaneous LD50 |
2000mg/kg[1] |
|
rat intravenous LD50 |
1714mg/kg[1] |
|
rat oral LD50 |
4070mg/kg[1] |
|
rat subcutaneous LD50 |
2000mg/kg[1] |
Reproductive effect[1].
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent antimicrobial, antibacterial, preservative, anticorrosive, dispersing 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 1886.184 Food safety national standard -- Food additive -- Sodium benzoate
(1b), Chinese Pharmacopoeia (2015 Edition) Sodium Benzoate
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 preservative.
2, Personal care products
Preservative, masking agent, anticorrosive agent in personal care products.
* * * * * *
Further information:
(1), In accordance with EU regulations (EC) No 1223/2009, directive 2007/17/EC, be included in Annex V/1.
Can be applied to leave-on products, rinse-off products (except oral care products) and oral care products.
(1a), Leave-on products: maximum concentration is 0.5% (as acid).
(1b), Rinse-off products (except oral care products): maximum concentration is 2.5% (as acid).
(1c), Oral care products: maximum concentration is 1.7% (as acid).
(2), In accordance with Safety and Technical Standards for Cosmetics (2015 Edition) of China, be included in the allowed preservatives and restricted components.
As preservative, maximum concentration is 0.5% (as acid).
As the restricted component, can be applied to rinse-off products, maximum concentration is 2.5% (as acid).
3, Food
Use as food additive (preservative).
4, Industrial cleaning agents
Use as corrosion inhibitor.
5, Medicine
Pharmaceutic adjuvant, use as bacteriostat. (This section is for reference only, should be implemented according to local Pharmacopoeia.)
Manufacturers
References
[1]: ChemIDplus. 532-32-1, Sodium benzoate
Update: 20140309(1); 20181112(2);