2-Aminopyridine

Modify Date: 2026-06-30 18:46:30

2-Aminopyridine Structure
2-Aminopyridine structure
 Common Name 2-Aminopyridine
CAS Number 504-29-0 Molecular Weight 94.115
Density 1.1±0.1 g/cm3 Boiling Point 210.6±0.0 °C at 760 mmHg
Molecular Formula C5H6N2 Melting Point 59 °C
MSDS Chinese USA Flash Point 98.7±7.0 °C
Symbol GHS06
GHS06		 Signal Word Danger

 Names

Name 2-Aminopyridine
Synonym More Synonyms

 Chemical & Physical Properties

Density 1.1±0.1 g/cm3
Boiling Point 210.6±0.0 °C at 760 mmHg
Melting Point 59 °C
Molecular Formula C5H6N2
Molecular Weight 94.115
Flash Point 98.7±7.0 °C
Exact Mass 94.053101
PSA 38.91000
LogP 0.62
Vapour Pressure 0.2±0.4 mmHg at 25°C
Index of Refraction 1.588
InChIKey ICSNLGPSRYBMBD-UHFFFAOYSA-N
SMILES Nc1ccccn1
Water Solubility Slightly soluble. 1-5 g/100 mL at 19 ºC

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
US1575000
CHEMICAL NAME :
Pyridine, 2-amino-
CAS REGISTRY NUMBER :
504-29-0
LAST UPDATED :
199712
DATA ITEMS CITED :
34
MOLECULAR FORMULA :
C5-H6-N2
MOLECULAR WEIGHT :
94.13
WISWESSER LINE NOTATION :
T6NJ BZ

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Human
DOSE/DURATION :
5 ppm/5H
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - convulsions or effect on seizure threshold Behavioral - antipsychotic
REFERENCE :
IMSUAI Industrial Medicine and Surgery. (Northbrook, IL) V.18-42, 1949-73. For publisher information, see IOHSA5. Volume(issue)/page/year: 19,317,1950
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
200 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,838,1986
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
48 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
GISAAA Gigiena i Sanitariya. For English translation, see HYSAAV. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1- 1936- Volume(issue)/page/year: 57(9-10),64,1992
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
29 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
AEPPAE Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. (Berlin, Ger.) V.110-253, 1925-66. For publisher information, see NSAPCC. Volume(issue)/page/year: 211,367,1950
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
145 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
GISAAA Gigiena i Sanitariya. For English translation, see HYSAAV. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1- 1936- Volume(issue)/page/year: 57(9-10),64,1992
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
25 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
USXXAM United States Patent Document. (U.S. Patent Office, Box 9, Washington, DC 20231) Volume(issue)/page/year: #3816470
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
70 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
AEPPAE Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. (Berlin, Ger.) V.110-253, 1925-66. For publisher information, see NSAPCC. Volume(issue)/page/year: 226,163,1955
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
23 mg/kg
TOXIC EFFECTS :
Behavioral - convulsions or effect on seizure threshold
REFERENCE :
APFRAD Annales Pharmaceutiques Francaises. (SPPIF, B.P.22, F-41353 Vineuil, France) V.1- 1943- Volume(issue)/page/year: 26,345,1968
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intracerebral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
4 mg/kg
TOXIC EFFECTS :
Behavioral - convulsions or effect on seizure threshold
REFERENCE :
AJEBAK Australian Journal of Experimental Biology and Medical Science. (Adelaide, S.A., Australia) V.1-64, 1924-86. Volume(issue)/page/year: 36,365,1958
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - guinea pig
DOSE/DURATION :
500 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,838,1986
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Bird - quail
DOSE/DURATION :
133 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
AECTCV Archives of Environmental Contamination and Toxicology. (Springer-Verlag New York, Inc., Service Center, 44 Hartz Way, Secaucus, NJ 070944) V.1- 1973- Volume(issue)/page/year: 12,355,1983
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Bird - wild bird species
DOSE/DURATION :
31600 ug/kg
REFERENCE :
AECTCV Archives of Environmental Contamination and Toxicology. (Springer-Verlag New York, Inc., Service Center, 44 Hartz Way, Secaucus, NJ 070944) V.1- 1973- Volume(issue)/page/year: 12,355,1983 *** REVIEWS *** ACGIH TLV-TWA 1.9 mg/m3 (0.5 ppm) DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 *** U.S. STANDARDS AND REGULATIONS *** MSHA STANDARD-air:TWA 0.5 ppm (2 mg/m3) DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: 3,11,1971 OSHA PEL (Gen Indu):8H TWA 0.5 ppm (2 mg/m3) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1910.1000,1994 OSHA PEL (Construc):8H TWA 0.5 ppm (2 mg/m3) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1926.55,1994 OSHA PEL (Shipyard):8H TWA 0.5 ppm (2 mg/m3) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 OSHA PEL (Fed Cont):8H TWA 0.5 ppm (2 mg/m3) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 41,50-204.50,1994 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-AUSTRALIA:.TWA 5 ppm (2 mg/m3) JAN 1993 OEL-AUSTRIA:TWA 0.5 ppm (2 mg/m3) JAN 1993 OEL-BELGIUM:TWA 0.5 ppm (2 mg/m3) JAN 1993 OEL-DENMARK:TWA 0.5 ppm (2 mg/m3) JAN 1993 OEL-FINLAND:TWA 0.5 ppm (2 mg/m3);STEL 1.5 ppm (6 mg/m3) JAN 1993 OEL-FRANCE:TWA 0.5 ppm (2 mg/m3) JAN 1993 OEL-GERMANY:TWA 0.5 ppm (2 mg/m3) JAN 1993 OEL-THE NETHERLANDS:TWA 0.5 ppm (2 mg/m3) JAN 1993 OEL-THE PHILIPPINES:TWA 0.5 ppm (2 mg/m3) JAN 1993 OEL-SWITZERLAND:TWA 0.5 ppm (2 mg/m3) JAN 1993 OEL-UNITED KINGDOM:TWA 0.5 ppm (2 mg/m3);STEL 2 ppm (8 mg/m3) JAN 1993 OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH RECOMMENDED EXPOSURE LEVEL (REL) : NIOSH REL TO 2-AMINOPYRIDINE-air:10H TWA 0.5 ppm REFERENCE : NIOSH* National Institute for Occupational Safety and Health, U.S. Dept. of Health, Education, and Welfare, Reports and Memoranda. Volume(issue)/page/year: DHHS #92-100,1992 NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 05215 No. of Facilities: 61 (estimated) No. of Industries: 3 No. of Occupations: 4 No. of Employees: 3159 (estimated) No. of Female Employees: 429 (estimated)

 Safety Information

Symbol GHS06
GHS06
Signal Word Danger
Hazard Statements H301 + H311-H315-H319-H335
Precautionary Statements Missing Phrase - N15.00950417-P280-P302 + P352 + P312-P305 + P351 + P338
Personal Protective Equipment Eyeshields;Faceshields;Gloves;type P2 (EN 143) respirator cartridges
Hazard Codes T:Toxic
Risk Phrases R25;R36/37/38
Safety Phrases S26-S36/37/39-S45-S38-S28B
RIDADR UN 2671 6.1/PG 2
WGK Germany 3
RTECS US1575000
Packaging Group II
Hazard Class 6.1
HS Code 2942000000

 Synthetic Route

 Customs

HS Code 2933399090
Summary 2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

 Articles35

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 Synonyms

2-Pyridylamine
pyridin-2-ylamine
aminopyridine-
amino-pyridine
2-Aminopyridine
A-PYRIDYLAMINE
2-AP,2-Pyridinamine,2-Pyridylamine
2(1H)-Pyridinimine
Aminoperazine
Pyridin-2-amin
2-pyridinylamine
pyridylamine
amino pyridine
mono(imino)pyridine
pyridin-2-amine
2-Pyridinamine
o-Aminopyridine
EINECS 207-988-4
2-amino-pyridine
aminopyridine
iminopyridine
MFCD00006312
Tenoxicam Impurity 1
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