1. OSHA Occupational Chemical Database
  2. N-NITROSOMORPHOLINE
Label abbreviations descriptions

N-NITROSOMORPHOLINE

Chemical Identification
Chemical Identification
CAS # 59-89-2
Formula

C₄H₈N₂O₂
Synonyms

NMOR
Physical Properties
Physical Properties
Physical description Yellow crystals. Golden liquid with many crystals at 68°F.
Boiling point 435°F at 747 mmHg Molecular weight 116.14
Freezing point/melting point 84°F Vapor pressure 25 mmHg
Flash point Vapor density
Specific gravity Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating NFPA fire rating
NFPA reactivity rating NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 1943
Sampling group
Sampler/Sampling media ThermoSorb/N air sampler [No longer available]
Sampling time*

75 min
Sampling volume (TWA)*

75 L
Sampling flow rate (TWA)*
 

1 L/min
Sampling volume (STEL/Peak/C)*
 

 
Sampling flow rate (STEL/Peak/C)*
 

 
Analytical method instruments GC-TEA
Method reference OSHA 27 (fully validated)
Notes
 

This media is no longer available. OSHA staff please contact the SLTC prior to sampling at (801) 233-4900.
Special requirements
 

Store samples in freezer.

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media
 

 
Bulk Method
Bulk Method
 

 
On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA
 

 

 REL-TWA
 

 

 TLV-TWA
 

 

 PEL-TWA
 

 
PEL-STEL
 

 

 REL-STEL
 

 

 TLV-STEL
 

 

 PEL-STEL
 

 
PEL-C
 

 

 REL-C
 

 

 TLV-C
 

 

 PEL-C
 

 
Skin notation
 

NA

 Skin notation
 

NA

 Skin notation
 

NA

 Skin notation
 

NA
Notes:
 

Not established

 Notes:
 

Not established

 Notes:
 

Not established

 Notes:
 

Not established
Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: NTP, IARC-2B Notes:
 

 
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 

 
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - N-Nitrosomorpholine

NIOSH: Pocket Guide to Chemical Hazards - N-Nitrosomorpholine

Literature References

 
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: QE7525000.
  • No Author: N-Nitrosomorpholine . Report on Carcinogens (latest edition); U.S. Department of Health and Human Services, Public Health Service, National Toxicology Program.
  • Fujita, K. and Kamataki, T.: Predicting the mutagenicity of tobacco-related N-nitrosamines in humans using 11 strains of Salmonella typhimurium YG7108, each coexpressing a form of human cytochrome P450 along with NADPH-cytochrome P450 reductase. Environ. Mol. Mutagen. 38(4): 339-346, (2001).
  • Hecht, S.S., Lijinsky, W., Kovatch, R.M., Chung, F.L. and Saavedra, J.E.: Comparative tumorigenicity of N-nitroso-2-hydroxymorpholine, N-nitrosodiethanolamine and N-nitrosomorpholine in A/J/ mice and F344 rats. Carcinogenesis 10(8): 1475-1477, (1989).
  • Monarca, S., et al.: Monitoring airborne genotoxicants in the rubber industry using genotoxicity tests and chemical analyses. Mutat. Res. 490(2): 159-169, (2001).
  • van Maanen, J.M., Pachen, D.M., Dallinga, J.W. and Kleinjans, J.C.: Formation of nitrosamines during consumption of nitrate- and amine-rich foods, and the influence of the use of mouthwashes. Cancer Detect. Prev. 22(3): 204-212, (1998).

Last Updated Date : 01/05/2021