1-Methyl-2-pyrrolidone
Synonyms
Methyl pyrrolidone;
2-Pyrrolidinone, 1-methyl-;
N-Methyl-2-pyrrolidinone;
Category
Non-ionic surfactant
> Amide
>> Lactams
Chemical Numbering System
CAS: 872-50-4
EINECS: 212-828-1
Molecular Formula & Molecular Weight
Molecular Formula: C5H9NO; C5H9N1O
Molecular Weight: 99.13
Structure
Properties
Appearance (1), liquid.
Solubility soluble in water.
Stability stable.
Risk Liquid form: flammable material; irritation, irritation to skin, eye. 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 intravenous LD50 |
63.3mg/kg[1] |
|
mouse intraperitoneal LD50 |
3050mg/kg[1] |
|
mouse intravenous LD50 |
54.5mg/kg[1] |
|
mouse oral LD50 |
5130mg/kg[1] |
|
rabbit skin LD50 |
8000mg/kg[1] |
|
rat inhalation LCLo |
1000mg/m3[1] |
|
rat intraperitoneal LD50 |
2472mg/kg[1] |
|
rat intravenous LD50 |
80.5mg/kg[1] |
|
rat oral LD50 |
3914mg/kg[1] |
|
rat subcutaneous LD50 |
> 2000mg/kg[1] |
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent cleansing, solubilizing, dispersing, emulsifying abilities.
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Liquid |
|
|
Actives, %, ≥ |
95.0 |
Test Methods
(1), Actives
GB/T 13173 Surface active agents -- Detergents -- Testing methods
2, Hazardous substances indexes
|
Item |
Hazardous substances indexes |
|
Liquid |
|
|
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.
Major Uses
1, Typical applications
Use as solvent.
Use as cleansing agent.
Use as dispersing agent, emulsifying agent.
Use as paint remover, degumming agent.
Manufacturers
References
[1]: ChemIDplus. 872-50-4, Methylpyrrolidone
Update: 20190818(1);