Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: Carbamic acid,N-butyl-N-nitroso-, ethyl ester
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Purity: 98.0%
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6558-78-7

6558-78-7 structure

6558-78-7 structure

Name: Carbamic acid,N-butyl-N-nitroso-, ethyl ester
Chemical Name: ethyl N-butyl-N-nitrosocarbamate
CAS Number: 6558-78-7
Molecular Formula: C₇H₁₄N₂O₃
Molecular Weight: 174.19800
Create Date: 2016-02-24 01:37:47
Modify Date: 2024-01-06 11:03:57

Name	ethyl N-butyl-N-nitrosocarbamate
Synonyms	N-Nitroso-N-butyl-urethan N-Butyl-N-nitrosourethan N-Butyl-N-nitrosourethane butyl-nitroso-carbamic acid ethyl ester N-n-Butyl-N-nitroso-urethan N-Nitrosobutylurethane 1-Butyl-1-nitrosourethan N-Nitroso-butylurethan BNUR TL 478 Butyl-nitroso-carbamidsaeure-aethylester N-Butyl-N-nitroso ethyl carbamate N-n-Butyl-N-nitrosourethane

Density	1.08g/cm3
Boiling Point	207.3ºC at 760 mmHg
Molecular Formula	C₇H₁₄N₂O₃
Molecular Weight	174.19800
Flash Point	79.2ºC
Exact Mass	174.10000
PSA	58.97000
LogP	1.92640
Index of Refraction	1.468

CHEMICAL IDENTIFICATION

RTECS NUMBER :: EZ1275000

CHEMICAL NAME :: Carbamic acid, N-butyl-N-nitroso-, ethyl ester

CAS REGISTRY NUMBER :: 6558-78-7

BEILSTEIN REFERENCE NO. :: 1780198

LAST UPDATED :: 199612

DATA ITEMS CITED :: 15

MOLECULAR FORMULA :: C7-H14-N2-O3

MOLECULAR WEIGHT :: 174.23

WISWESSER LINE NOTATION :: ONN4&VO2

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 900 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: LCLo - Lowest published lethal concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 300 mg/m3/10M

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 500 mg/kg female 20 day(s) after conception

TOXIC EFFECTS :: Tumorigenic - equivocal tumorigenic agent by RTECS criteria Reproductive - Tumorigenic effects - transplacental tumorigenesis Endocrine - tumors

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 2240 mg/kg/8W-C

TOXIC EFFECTS :: Tumorigenic - equivocal tumorigenic agent by RTECS criteria Gastrointestinal - tumors

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Subcutaneous

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 150 mg/kg female 15-21 day(s) after conception

TOXIC EFFECTS :: Tumorigenic - equivocal tumorigenic agent by RTECS criteria Reproductive - Tumorigenic effects - transplacental tumorigenesis Reproductive - Tumorigenic effects - testicular tumors

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 5300 mg/kg/20W-C

TOXIC EFFECTS :: Tumorigenic - neoplastic by RTECS criteria Gastrointestinal - tumors

TYPE OF TEST :: TD - Toxic dose (other than lowest)

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 5040 mg/kg/18W-C

TOXIC EFFECTS :: Tumorigenic - equivocal tumorigenic agent by RTECS criteria Gastrointestinal - tumors

TYPE OF TEST :: TD - Toxic dose (other than lowest)

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Mammal - species unspecified

DOSE/DURATION :: 5 gm/kg/16W-C

TOXIC EFFECTS :: Tumorigenic - equivocal tumorigenic agent by RTECS criteria Gastrointestinal - tumors

TYPE OF TEST :: TD - Toxic dose (other than lowest)

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 5 gm/kg/16W-C

TOXIC EFFECTS :: Tumorigenic - equivocal tumorigenic agent by RTECS criteria Gastrointestinal - tumors

MUTATION DATA

TYPE OF TEST :: Sister chromatid exchange

TEST SYSTEM :: Rodent - hamster Fibroblast

DOSE/DURATION :: 100 umol/L

REFERENCE :: JNCIAM Journal of the National Cancer Institute. (Washington, DC) V.1-60, 1940-78. For publisher information, see JJIND8. Volume(issue)/page/year: 58,1635,1977

HS Code	2928000090

591-62-8 structure

591-62-8

~%

6558-78-7 structure

6558-78-7

Literature: Nirdlinger; Acree American Chemical Journal, 1910 , vol. 43, p. 380

Precursor 1
591-62-8
DownStream 2
106303-37-1 764-43-2

HS Code	2928000090
Summary	2928000090 other organic derivatives of hydrazine or of hydroxylamine VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:20.0%