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n-Nitroso-n-Ethylurea

CAS Number

759-73-9

Synonym

ENU; Ethylnitrosourea; N-ethylnitrosourea; N-ethyl-n-nitrosourea; 1-ethyl-1-nitrosourea; NEU; Nitrosoethylurea; NSC 45403

Occurrence/Use

Research chemical (induces cancer), medicine (chemotherapy drug). Formerly used in the synthesis of diazoethane.

n-Nitroso-n-Ethylurea

Cancer Potency Information

Inhalation Unit Risk (μg/cubic meter)-1: 
7.7 E-3
Inhalation Slope Factor (mg/kg-day)-1: 
2.7 E+1
Oral Slope Factor (mg/kg-day)-1: 
2.7 E+1
Comments/References: 

OEHHA 1992. Expedited Cancer Potency Values and Proposed Regulatory Levels for Certain Proposition 65 Carcinogens.

 

Note: This value was used as the basis of the No Significant Risk Level that was adopted in Title 22 California Code of Regulations, Section 12705, Subsection (b) for the purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65).

Proposition 65

Chemical Status

Cancer: 
Currently listed

Cancer

Listed as causing: 
Cancer
Date of Listing: 
10/01/1987
Basis for Listing: 
State's Qualified Experts

Safe Harbor Levels

Cancer
No Significant Risk Level (NSRL): 
0.03 µg/day