N-甲基吡咯烷酮

Description

N-methyl pyrrolidone is identified by CAS 872-50-4, molecular formula C5H9NO and molecular weight 99.07 g/mol. UNII JR9CE63FPM; ChEBI 7307; InChIKey SECXISVLQFMRJM-UHFFFAOYSA-N. Boiling Point: 396 °F at 760 mmHg (NTP, 1992); Boiling Point: 202 °C at 760 mm Hg; Boiling Point: 202 °C.

Identification

CAS Registry Number	872-50-4
PubChem CID	13387
Molecular formula	C5H9NO
Molecular weight	99.07 g/mol
IUPAC name	1-methylpyrrolidin-2-one
InChIKey	SECXISVLQFMRJM-UHFFFAOYSA-N
UNII (FDA)	JR9CE63FPM
ChEBI ID	CHEBI:7307

Computed Descriptors

Molecular Weight	99.13
XLogP3	-0.5
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	0
Exact Mass	99.068413911
Monoisotopic Mass	99.068413911
Topological Polar Surface Area	20.3
Heavy Atom Count	7
Formal Charge	0

Physical & Chemical Properties

Boiling Point	396 °F at 760 mmHg (NTP, 1992)
Boiling Point	202 °C at 760 mm Hg
Boiling Point	202 °C
Boiling Point	396 °F
Boiling Point	202 °C @760 [mm Hg]
Melting Point	-9 °F (NTP, 1992)
Melting Point	-25 °C
Melting Point	-24.4 °C
Melting Point	-9 °F
Melting Point	-23.09 °C

Physical description & handling notes

• N-methyl-2-pyrrolidone appears as a clear colorless liquid with a "fishlike" odor. Denser than water. Flash point 199 °F. Contact may irritate skin, eyes and mucous membranes. May be toxic by ingestion.
• Liquid; Liquid; Other Solid; Dry Powder; CBI
• A clear colorless liquid with a fish-like odor; [CAMEO] Almost colorless liquid with an amine odor; [AIHA]
• COLOURLESS HYGROSCOPIC LIQUID WITH CHARACTERISTIC ODOUR.
• A clear colorless liquid with a fish-like odor.
• Clear liquid

Regulatory Status

Regulatory & Food Contact	FDA Cumulative Estimated Daily Intake (CEDI): FCS FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS CIR / INCI: Surfactant
GHS notification summary	0.1% (1 / 2679)

GHS Hazard Classification

GHS notification summary	0.1% (1 / 2679)
Reported hazard statements	H315, H319, H335, H360 (94.2%), H227, H336, H373, H361

Documented Uses

• Metal Degreasing [Category: Clean]
• Semiconductor Manufacturing [Category: Industry]
• Painting (Solvents) [Category: Paint]
• Working with Glues and Adhesives [Category: Other]
• Silk-Screen Printing [Category: Other]
• Important areas of use:[Table#5034]

Synonyms

1-METHYL-2-PYRROLIDINONE; 872-50-4; N-Methyl-2-pyrrolidone; N-Methylpyrrolidone; N-Methyl-2-pyrrolidinone; Methylpyrrolidone; 1-Methyl-2-pyrrolidone; 1-Methylpyrrolidone; Methyl pyrrolidone; N-Methylpyrrolidinone; 1-Methylpyrrolidinone; n-methyl-pyrrolidone; 1-Methyl-5-pyrrolidinone; 2-Pyrrolidinone, 1-methyl-; 1-Methylazacyclopentan-2-one; N-Methyl-gamma-butyrolactam

Frequently Asked Questions

What are the CAS number and molecular formula of N-methyl pyrrolidone?

CAS 872-50-4; molecular formula C5H9NO; molecular weight 99.07 g/mol.

What other names is N-methyl pyrrolidone known by?

1-METHYL-2-PYRROLIDINONE, 872-50-4, N-Methyl-2-pyrrolidone, N-Methylpyrrolidone, N-Methyl-2-pyrrolidinone, Methylpyrrolidone.

What is the regulatory status of N-methyl pyrrolidone?

Documented regulatory listings: FDA Cumulative Estimated Daily Intake (CEDI): FCS; FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS; CIR / INCI: Surfactant.

Is N-methyl pyrrolidone classified as hazardous?

0.1% of GHS notifications report no hazard classification (1 of 2679).

What are the key physical properties of N-methyl pyrrolidone?

Boiling Point: 396 °F at 760 mmHg (NTP, 1992); Boiling Point: 202 °C at 760 mm Hg; Boiling Point: 202 °C; Boiling Point: 396 °F.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.