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Substance Name: N-Nitrosopyrrolidine
RN: 930-55-2


  • Carcinogenic nitrosamine that may be formed from preservatives in meats during their preparation or in the liver during metabolism.

Molecular Formula

  • C4-H8-N2-O

Molecular Weight

  • 100.1202

Classification Codes

Classification Codes

  • Mutation Data
  • TSCA Flag S (Substance is Identified in a Final Significant New Use Rule)
  • Tumor Data

Superlist Classification Codes

  • Overall Carcinogenic Evaluation: Group 2B
  • Reasonably Anticipated to be a Carcinogen
  • Reportable Quantity (RQ) = 1 lb
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Names and Synonyms

Name of Substance

  • N-Nitrosopyrrolidine

MeSH Heading

  • N-Nitrosopyrrolidine


  • 1-Nitrosopyrrolidine
  • 1-Pyrrolidinamine, N-nitroso-
  • 5-20-01-00521 (Beilstein Handbook Reference)
  • AI3-62030
  • BRN 0107615
  • CCRIS 478
  • EINECS 213-218-8
  • HSDB 5116
  • N-Nitrosopyrrolidin
  • N-Nitrosopyrrolidin [German]
  • N-Nitrosopyrrolidine
  • N-PYR
  • Nitrosopyrrolidine
  • No-pyr
  • NSC 18797
  • Pyrrole, tetrahydro-N-nitroso-
  • Pyrrolidine, 1-nitroso-
  • RCRA waste number U180
  • UNII-SZ4J5WK201

Systematic Names

  • 1-Nitrosopyrrolidine
  • N-Nitrosopyrrolidine
  • Pyrrolidine, 1-nitroso-

Superlist Names

  • N-Nitrosopyrrolidine
  • Pyrrolidine, 1-nitroso-
  • RCRA waste no. U180

Registry Numbers

CAS Registry Number

  • 930-55-2


  • SZ4J5WK201

Other Registry Number

  • 68374-63-0

System Generated Number

  • 0000930552

Structure Descriptors








Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
hamster LD50 oral 1023mg/kg (1023mg/kg)   Journal of Cancer Research and Clinical Oncology. Vol. 104, Pg. 75, 1982.
mouse LD50 oral 125mg/kg (125mg/kg)   "Chemical Tumour Problems," Nakahara, W., ed., Tokyo, Japanese Soc. for the Promotion of Science, 1970Vol. -, Pg. 129, 1970.
mouse LD50 subcutaneous 125mg/kg (125mg/kg)   "Chemical Tumour Problems," Nakahara, W., ed., Tokyo, Japanese Soc. for the Promotion of Science, 1970Vol. -, Pg. 129, 1970.
rat LD50 oral 900mg/kg (900mg/kg)   Zeitschrift fuer Krebsforschung. Vol. 69, Pg. 103, 1967.

Physical Properties

Physical Property Value Units Temp (deg C) Source
Boiling Point 214 deg C   EXP
log P (octanol-water) -0.19 (none)   EXP
Water Solubility 1.00E+06 mg/L 24 EXP
Vapor Pressure 0.06 mm Hg 20 EXP
Henry's Law Constant 4.89E-08 atm-m3/mole 37 EXP
Atmospheric OH Rate Constant 1.55E-11 cm3/molecule-sec 25 EST

Physical property data is provided to ChemIDplus by SRC, Inc.