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Study Information
Study Attribute Value
CEBS Accession Number: 002-01698-0009-0000-5
Chemical Name: Benzo(a)pyrene
CASRN: 50-32-8
NTP Study Type: Genetic Toxicology - Rodent Cytogenetics
NTP Study ID: 181345_CA
Study Result: Positive (Nonstandard Protocol)

Test Type Start Date Sample Time (h) Species Sex Tissue Protocol Trend Test P
CA 06/20/83 18 Mouse Male Bone Marrow Intraperitoneal Injection x 1/study, 18 hour 0.6164
Test Group Dose
(mg/kg)		 n Percent Cells w/ Aberrations
(Mean ± SEM)		 Pairwise P
Test Chemical Benzo(a)pyrene 
37.5       
 4 5.75 ± 0.75 0.3191
  
75         
 4 3.50 ± 1.32 0.8535
  
150         
 4 5.00 ± 1.08 0.5000
Vehicle Control No Stressor 
 0         
 4 5.00 ± 0.91 0.0000


Footnotes:
IP/IJ: Intraperitoneal Injection
INHAL: Inhalation
n: Number of animals analyzed