N-methyl-pyrrolidone (NMP)
Chemical name: N-methy-lpyrrolidone;1- methyl-2-pyrrolidone;
 N-methyl-2-pyrrolidone
CAS NO.: 872-50-4
Molecular formula: C₅H₉NO
Character: colorless transparent liquid; be hygroscopic and miscible with water in any ratio, and also miscible with alcohol, ether, acetone, aromatic hydrocarbons and other solvents.
Application:
1. Micro-electronic grade: It is applicable to LCD, semiconductor, circuit boards, carbon nanotubes and other high-end microelectronic industry.
2.Electronic grade: It is applicable to such industries as aramid fiber, PPS, ultrafiltration membrane, OLED plate photoetching, glue etching and other industries.
3.Battery grade:It is applicable to lithium batteries and other industries.
4.Industrial grade: It is applicable to the acetylene concentration, butadiene extraction,electrical insulating materials, high-grade paints, pesticide adjuvants, inks, paints, indus-trial cleaning agent and other industries.
Specification and indicators

Items	Micro-electronic grade	Electronic grade	Battery grade	Industrial grade
Purity (GC, wt%)	≥99.95	≥99.9	≥99.9	≥99.8
Water (K.F.,ppm）	≤100	≤200	≤200	≤500
Chroma (Hazen, APHA）	≤10	≤10	≤10	≤30
10% solution pH value	6-9	6-9	6-9	6.5-10
free amine(ppm)	/	/	≤20	/
total amine (based on MMA, ppm)	≤15	≤20	≤30	/
Cl-，PO43-, SO42-(ppm)	≤0.02	≤0.02	/	/
NO3- (ppm）	≤0.01	≤0.01	/	/
Metal ion(ppb)    K、Na、Ca、Zn、Mg、Cd、Pb、Cr、Hg、As、Ni、Sn、B、Si、Mn、Fe、Cu、Ag、Ti、Al、Li、Co、Au	≤10	≤20	/	/

 
γ-butyrolactone (GBL)
Chemical name:  1,4-butyrolactone; γ-butyrolactone    
CAS NO.：96-48-0
Molecular formula:C₄H₆O₂
Character: colorless and transparent oily liquid with odor similar to acetone; be miscible with water, acetone, carbon tetrachloride and ethanol, and can be decomposed in hot lye with aromatic odor.
Application:
 r-butyrolactone is an important organic chemical raw material, which is widely used in the pharmaceutical, pesticide, petrochemical and
other industries.
    1. It can be used to synthesize pyrrolidone products;
    2. It can be used as a pharmaceutical intermediate, such as Cyclopropylamine and vitamin;
    3. It can be used as a pesticide intermediate, such as herbicide and plant growth regulator;
    4. It can be used for alkenes, alkynes extraction agent, absorbent and dispersing agent;
    5. It can be used to synthesize resin as an antioxidant, plasticizer, dispersing agent, fixing agent and solvent;
    6. It can be used to synthesize fiber spinning solvent, coagulant, dyeing assistant and antistatic agent;
    7. It can be used as a raw material of color film former, electrolyte, capacitor and ink lubricant.
Specification and indicators

ltems	lndustrial grade	Electronic grade	Micro-electronic grade
Purity (GC，wt%)	≥99.5%	≥99.8%	99.90%
Water (K.F.,wt%)	≤0.05%	≤0.03%	≤0.02%
Chroma (Hazen，APHA)	≤10#	≤10#	≤10#
1,4 butanediol（wt%）	≤0.05	≤0.03	≤0.03
acid number（wt%）	≤0.05	≤0.03	≤0.03
Density (@20℃，g/ml)	1.125～1.135	1.125～1.135	1.125～1.135
Refractive index (@20℃)	1.435～1.438	1.435～1.438	1.435～1.438

 

α-pyrrolidinone (α-p)
Chemical name: α-pyrrolidone, 2 - pyrrolidone, 4-- butyrolactam
CAS No: 616-45-5
Molecular formula:C₄H₇NO
Character: colorless or slightly yellow transparent liquid or crystal with slight ammonia smell; be miscible with water, alcohol, ether, chloroform, benzene, ethyl acetate, carbon disulfide and most organic solvents in any ratio; and be insoluble in petroleum ether.
Application:
α-pyrrolidone is an important chemical raw material and high-polarity organic solvent. It is widely used in the pharmaceutical, textile, cosmetic, solvent, electronic cleaning and other industries.  
 1. As an organic synthetic raw material and intermediate, it is mainly used polyvinylpyrrolidone, piracetam, γ-aminobutyric acid, nylon -4, polyamide fibers etc.   
 2. As a solvent, it is mainly used in synthetic resins, pesticides, plasticizers, coloring agent, floor polishes, polyhydric alcohols, printing inks, coatings, iodine, electronics cleaning etc.
Specification and indicators

ltems	Excellent grade	First grade
Purity (GC，wt%)	≥99.5%	≥99.0%
Water content (K.F.,wt%)	≤0.1%	≤0.1%
Chroma (Hazen，APHA)	≤10#	≤20#
Density (@20℃，g/ml)	1.107～1.115	1.107～1.115
Refractive index (@20℃)	1.482～1.486	1.482～1.486

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