Caprolactam

Description

Caprolactam · CAS 105-60-2 · C6H11NO. UNII 6879X594Z8. Boiling Point: 512.4 °F at 760 mmHg (NTP, 1992); Boiling Point: 270 °C; Boiling Point: BP: 180 °C @ 50 mm Hg.

Identification

CAS Registry Number	105-60-2
PubChem CID	7768
Molecular formula	C6H11NO
IUPAC name	azepan-2-one
UNII (FDA)	6879X594Z8
FEMA number	4235
JECFA number	1594

Computed Descriptors

Molecular Weight	113.16
XLogP3	-0.1
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	0
Exact Mass	113.084063974
Monoisotopic Mass	113.084063974
Topological Polar Surface Area	29.1
Heavy Atom Count	8
Formal Charge	0

Physical & Chemical Properties

Boiling Point	512.4 °F at 760 mmHg (NTP, 1992)
Boiling Point	270 °C
Boiling Point	BP: 180 °C @ 50 mm Hg
Boiling Point	267 °C
Boiling Point	515 °F
Boiling Point	270 °C @760 [mm Hg]
Melting Point	156 °F (NTP, 1992)
Melting Point	69.3 °C
Melting Point	70 °C
Melting Point	156 °F

Physical description & handling notes

• Large Crystals; CBI; Large Crystals; Liquid; Liquid; Liquid; Other Solid
• White, crystalline solid or flakes with an unpleasant odor; Note: Significant vapor concentrations would be expected only at elevated temperatures; [NIOSH]
• WHITE HYGROSCOPIC CRYSTALS OR FLAKES.
• Yellowish solid; Amine, spicy aroma
• Clear to milky white-colored solution with a mild, disagreeable odor.
• White, crystalline solid or flakes with an unpleasant odor. [Note: Significant vapor concentrations would be expected only at elevated temperatures.]

Regulatory Status

Regulatory & Food Contact	EU Flavoring substances FDA Substance added to food: FLAVORING AGENT OR ADJUVANT FDA Cumulative Estimated Daily Intake (CEDI): FCS FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS Flavoring Agents FLAVOURING_AGENT: Flavouring Agent
GHS notification summary	0.1% (1 / 1874)

GHS Hazard Classification

GHS notification summary	0.1% (1 / 1874)
Reported hazard statements	H302, H315, H319, H332, H335, H312, H361, H371

Documented Uses

• Caprolactam is primarily used in the manufacture of synthetic fibers (especially Nylon 6). Caprolactam is also used in brush bristles, textile stiffeners, film coatings, synthetic leather, plastics, plasticizers, paint vehicles, cross-linking for polyurethanes, and in the synthesis of lysine.
• Used as a monomer for synthetic fibers, plastics, coatings, plasticizers, and paint vehicles and as a cross-linking agent for polyurethanes. [ACGIH]
• Painting (Pigments, Binders, and Biocides) [Category: Paint]
• Plastic Composites Manufacturing [Category: Industry]
• Mfr synthetic fibers of the polyamide type (Perlon); solvent for high mol wt polymers
• Manufacture of synthetic fibers (especially nylon 6), plastics, bristles, film, coatings, synthetic leather, plasticizers and paint vehicles, cross-linking agent for polyurethanes, synthesis of amino acid lysine.

Synonyms

azepan-2-one; CAPROLACTAM; 105-60-2; epsilon-Caprolactam; 2-Oxohexamethylenimine; 6-Caprolactam; Aminocaproic lactam; Hexahydro-2H-azepin-2-one; 6-Hexanelactam; 2-Oxohexamethyleneimine; 2-Azacycloheptanone; Hexanolactam; 2H-Azepin-2-one, hexahydro-; Hexahydro-2-azepinone; 2-Perhydroazepinone; 1,6-Hexolactam

Frequently Asked Questions

What are the CAS number and molecular formula of Caprolactam?

CAS 105-60-2; molecular formula C6H11NO; molecular weight — g/mol.

What other names is Caprolactam known by?

azepan-2-one, CAPROLACTAM, 105-60-2, epsilon-Caprolactam, 2-Oxohexamethylenimine, 6-Caprolactam.

What is the regulatory status of Caprolactam?

Documented regulatory listings: EU Flavoring substances; FDA Substance added to food: FLAVORING AGENT OR ADJUVANT; FDA Cumulative Estimated Daily Intake (CEDI): FCS.

Is Caprolactam classified as hazardous?

0.1% of GHS notifications report no hazard classification (1 of 1874).

What are the key physical properties of Caprolactam?

Boiling Point: 512.4 °F at 760 mmHg (NTP, 1992); Boiling Point: 270 °C; Boiling Point: BP: 180 °C @ 50 mm Hg; Boiling Point: 267 °C.

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.