Melatonin
Synonyms
Acetamide, N-(2-(5-methoxyindol-3-yl)ethyl)-;
5-Methoxy-N-acetyltryptamine;
Category
Non-ionic surfactant
> Amine
>> Heteroaromatic Amine
>>> Pyrrole and its Derivatives
Chemical Numbering System
CAS: 73-31-4
EINECS: 200-797-7
Molecular Formula & Molecular Weight
Molecular Formula: C13H16N2O2
Molecular Weight: 232.28
Structure
Properties
Appearance (1), solid.
Solubility slightly 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 label: 
Animal Toxicity
Table 1 Animal toxicity values
|
mouse intraperitoneal LD50 |
1375mg/kg[1] |
|
mouse intravenous LD50 |
180mg/kg[1] |
|
mouse oral LD50 |
1250mg/kg[1] |
|
mouse subcutaneous LD50 |
> 1600mg/kg[1] |
|
rat intraperitoneal LD50 |
1131mg/kg[1] |
|
rat intravenous LD50 |
356mg/kg[1] |
|
rat oral LD50 |
> 3200mg/kg[1] |
|
rat subcutaneous LD50 |
> 1600mg/kg[1] |
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent anti-oxidizing, antistatic, dispersing abilities. Hormones.
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, 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 in personal care products.
Manufacturers
References
[1]: ChemIDplus. 73-31-4, Melatonin
Update: 20200905(1);