NPYR

Modify Date: 2025-08-20 12:10:24

NPYR structure	Common Name	NPYR
	CAS Number	930-55-2	Molecular Weight	100.119
	Density	1.2±0.1 g/cm3	Boiling Point	214.0±9.0 °C at 760 mmHg
	Molecular Formula	C₄H₈N₂O	Melting Point	N/A
	MSDS	N/A	Flash Point	83.3±0.0 °C
	Symbol	GHS07, GHS08	Signal Word	Warning

Name	1-Nitrosopyrrolidine
Synonym	More Synonyms

Density	1.2±0.1 g/cm3
Boiling Point	214.0±9.0 °C at 760 mmHg
Molecular Formula	C₄H₈N₂O
Molecular Weight	100.119
Flash Point	83.3±0.0 °C
Exact Mass	100.063660
PSA	32.67000
LogP	-0.15
Vapour Pressure	0.2±0.4 mmHg at 25°C
Index of Refraction	1.565
Storage condition	Refrigerator

NPYR MSDS(Chinese)

CHEMICAL IDENTIFICATION

RTECS NUMBER :: UY1575000

CHEMICAL NAME :: Pyrrolidine, 1-nitroso-

CAS REGISTRY NUMBER :: 930-55-2

BEILSTEIN REFERENCE NO. :: 0107615

LAST UPDATED :: 199801

DATA ITEMS CITED :: 52

MOLECULAR FORMULA :: C4-H8-N2-O

MOLECULAR WEIGHT :: 100.14

WISWESSER LINE NOTATION :: T5NTJ ANO

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 :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 125 mg/kg

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

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

ROUTE OF EXPOSURE :: Subcutaneous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 125 mg/kg

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

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - hamster

DOSE/DURATION :: 1023 mg/kg

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 :: 476 mg/kg/3.3Y-C

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Liver - tumors

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 3235 mg/kg/92W-C

TOXIC EFFECTS :: Tumorigenic - neoplastic by RTECS criteria Lungs, Thorax, or Respiration - tumors Liver - tumors

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 100 mg/kg/7W-I

TOXIC EFFECTS :: Tumorigenic - neoplastic by RTECS criteria Lungs, Thorax, or Respiration - tumors

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Subcutaneous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 396 mg/kg/72W-I

TOXIC EFFECTS :: Tumorigenic - neoplastic by RTECS criteria Lungs, Thorax, or Respiration - tumors Liver - tumors

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - hamster

DOSE/DURATION :: 465 mg/kg/52W-C

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Liver - tumors

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - hamster

DOSE/DURATION :: 1602 mg/kg/25W-I

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Sense Organs and Special Senses (Olfaction) - tumors Lungs, Thorax, or Respiration - tumors

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Unreported

SPECIES OBSERVED :: Rodent - hamster

DOSE/DURATION :: 1602 mg/kg/25W-I

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Sense Organs and Special Senses (Olfaction) - tumors Lungs, Thorax, or Respiration - tumors

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

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - hamster

DOSE/DURATION :: 798 mg/kg/25W-I

TOXIC EFFECTS :: Tumorigenic - neoplastic by RTECS criteria Sense Organs and Special Senses (Olfaction) - tumors Lungs, Thorax, or Respiration - tumors

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 1350 mg/kg/30W-C

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

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - hamster

DOSE/DURATION :: 704 mg/kg/39W-C

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Liver - tumors

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 792 mg/kg/2Y-I

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Liver - tumors Tumorigenic - increased incidence of tumors in susceptible strains

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 2250 mg/kg/50W-I

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Liver - tumors

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 685 mg/kg/98W-C

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Liver - tumors

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 1599 mg/kg/76W-C

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Liver - tumors

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 4380 mg/kg/52W-C

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Liver - tumors

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - hamster

DOSE/DURATION :: 1049 mg/kg/64W-C

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Liver - tumors

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 4033 mg/kg/62W-C

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Liver - tumors

TYPE OF TEST :: Specific locus test

TYPE OF TEST :: DNA damage

MUTATION DATA

TYPE OF TEST :: Unscheduled DNA synthesis

TEST SYSTEM :: Rodent - hamster Liver

DOSE/DURATION :: 100 umol/L

REFERENCE :: ENMUDM Environmental Mutagenesis. (New York, NY) V.1-9, 1979-87. For publisher information, see EMMUEG. Volume(issue)/page/year: 5,1,1983 *** REVIEWS *** IARC Cancer Review:Animal Sufficient Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) V.1- 1972- Volume(issue)/page/year: 17,313,1978 IARC Cancer Review:Human No Adequate Data IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) V.1- 1972- Volume(issue)/page/year: 17,313,1978 IARC Cancer Review:Group 2B IMSUDL IARC Monographs, Supplement. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) No.1- 1979- Volume(issue)/page/year: 7,56,1987 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-FRANCE;Carcinogen JAN 1993 OEL-GERMANY;Carcinogen JAN 1993 OEL-SWITZERLAND;Carcinogen JAN 1993

Symbol	GHS07, GHS08
Signal Word	Warning
Hazard Statements	H302-H351
Precautionary Statements	P281
Personal Protective Equipment	Eyeshields;Faceshields;full-face respirator (US);Gloves;multi-purpose combination respirator cartridge (US);type ABEK (EN14387) respirator filter
Hazard Codes	Xn: Harmful;
Risk Phrases	40
RIDADR	2810
WGK Germany	3
RTECS	UY1575000
Packaging Group	III
Hazard Class	6.1(b)
HS Code	2933990090

Precursor 10
CAS#:123-75-1 Pyrrolidine CAS#:110-60-1 putrescine CAS#:120-94-5 1-Methylpyrrolidine CAS#:73722-93-7 1-(methoxymethy...
CAS#:563-70-2 Bromonitromethane CAS#:694-00-8 N-deuteriopyrro... CAS#:25924-78-1 (2E,4E)-5-(1,3-... CAS#:80-11-5 Diazald
CAS#:543-67-9 Nitrous acid, p... CAS#:544-16-1 Butyl nitrite
DownStream 7
CAS#:5371-52-8 2-Hydroxytetrah... CAS#:123-75-1 Pyrrolidine CAS#:16596-41-1 1-Pyrrolidinamine CAS#:3760-55-2 1-nitropyrrolidine
CAS#:66162-29-6 2-(4-Chlorobenz... CAS#:66162-38-7 2-[(4-methoxyph... CAS#:5455-25-4 N-benzoyl-N-pyr...

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

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Pyrrolidine, nitroso-

1-Nitrosopyrrolidine

EINECS 213-218-8

N-nitrosopyrrolidine

Pyrrolidine, 1-nitroso-

MFCD00003166

NPYR

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Shanghai Nianxing Industrial Co., Ltd
China
Product Name: NPYR
Price: Check
Purity: 98.0%
Delivery: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Shanghai Jizhi Biochemical Technology Co., Ltd
China
Product Name: NPYR
Price: ￥778.0/5g
Purity: 99.0%
Delivery: Inquiry
Contact: Liu jia
Email: 2130147988@qq.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: Pyrrolidine, 1-nitroso-
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Delivery: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

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NPYR

Names

Chemical & Physical Properties

MSDS

Toxicological Information

CHEMICAL IDENTIFICATION

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

MUTATION DATA

Safety Information

Synthetic Route

Precursor & DownStream

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Synonyms

The content on this webpage is sourced from various professional data sources. If you have any questions or concerns regarding the content, please feel free to contact service1@chemsrc.com.