Ascorbyl palmitate
Synonyms
6-O-Palmitoylascorbic acid;
L-Ascorbic acid, 6-hexadecanoate;
L-Ascorbic acid, 6-palmitate;
Category
Non-ionic surfactant
> Ester
>> Lactones
Chemical Numbering System
CAS: 137-66-6
EINECS: 205-305-4
Molecular Formula & Molecular Weight
Molecular Formula: C22H38O7
Molecular Weight: 414.53
Structure
Properties
Appearance (1), white powder.
Odor citrus-like flavor.
Solubility slightly soluble in water.
Stability stable. Easily oxidized. Under strong alkali condition, easily hydrolyzed.
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
|
mouse oral LD50 |
25000mg/kg[1] |
|
guinea pig skin LD50 |
> 3000mg/kg[1] |
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent anti-oxidizing, dispersing, emulsifying 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 1886.230 Food safety national standard -- Food additive -- Ascorbyl palmitate
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 antioxidant.
2, Personal care products
Antioxidant, masking agent in personal care products. Good whitening effect.
3, Food
Use as food additive (antioxidant, flour treatment agent), food nutrition enhancer.
Manufacturers
References
[1]: ChemIDplus. 137-66-6, Ascorbyl palmitate
Update: 20141016(1); 20200412(2);