Caprolactam

  • Hexahydro-2H-azepin-2-one
  • Aminocaproic lactam
  • Epsilon-Caprolactam
Formula
C6H11NO
Structure
Description
White, crystalline solid or flakes with an unpleasant odor, hygroscopic.
Uses
Manufacture synthetic fibers of the polyamide type (perlon), solvent for high mol wt polymers.

Registry Numbers and Inventories.
CAS
105-60-2
EC (EINECS/ELINCS)
203-313-2
EC Index Number
613-069-00-2
EC Class
Harmful; Irritant
R 20/22 36/37/38
RTECS
CM3675000
RTECS class
Tumorigen; Mutagen; Reproductive Effector; Human Data; Primary Irritant
Merck
13,1767
Beilstein/Gmelin
106934
Beilstein Reference
5-21-06-00444
Swiss Giftliste 1
G-2175
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C6H11NO
Formula mass
113.16
Melting point, °C
68 - 70
Boiling point, °C
266.9
Vapor pressure, mmHg
1 (60 C)
Vapor density (air=1)
3.91
Saturation Concentration
1.32 ppm (0.0001%) at 20 C (calculated)
Odor Threshold Odor threshold 0.3 mg/m3
Critical temperature
506.9
Critical pressure
45
Density
1.022 g/cm3
Solubility in water
Miscible
Viscosity
9 cp @ 78C
Surface tension
20 g/s2
Refractive index
1.4965 (20 C)
Heat of fusion
15.2 kJ/mol
Heat of vaporization
74.10 kJ/mol
Heat of combustion
-3604 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Store in a tightly closed container.
Handling
Wash thoroughly after handling. Avoid breathing dust, vapor, mist, or gas. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Use only in a chemical fume hood.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Wash area with soap and water. Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.
Disposal code
3
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong bases.
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
152
Autoignition, °C
395
Upper exp. limit, %
8
Lower exp. limit, %
1.4
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Hazards
Toxic oxides of nitrogen
Combustion products
Toxic oxides of nitrogen
Health
1
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: Dust: TWA 1 mg/m3 ST 3 mg/m3 Vapor: TWA 0.22 ppm (1 mg/m3) ST 0.66 ppm (3 mg/m3)
Poison_Class
4
Exposure effects
Chronic ingestion may cause neurological symptoms.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed.
   Inhalation
Causes respiratory tract irritation. Toxic if inhaled.
   Skin
Causes skin irritation. May be absorbed through the skin in harmful amounts. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material. May cause dermatitis.
   Eyes
Vapors cause eye irritation.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
USCG CHRIS Code
CLS
 
22 Caprolactam solution
HS Code
2933 71 00
 
Std. Transport #
4941102
 
IMO Pollution Category
D