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Henan Tianfu Chemical Co., Ltd.
China
Product Name: 5-Ethyl-2-methylpyridine
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104-90-5

104-90-5 structure

104-90-5 structure

Name: 5-Ethyl-2-methylpyridine
Chemical Name: 5-Ethyl-2-methylpyridine
CAS Number: 104-90-5
Molecular Formula: C₈H₁₁N
Molecular Weight: 121.180
Catalog: Pharmaceutical intermediate Heterocyclic compound Pyridine compound Ethylpyridine
Create Date: 2018-09-04 18:13:14
Modify Date: 2026-06-29 21:08:54

Name	5-Ethyl-2-methylpyridine
Synonyms	Nicotinic Acid Impurity 3 (Nicotinic Acid Impurity C) Aldehydecollidine 5-ethyl-2-methyl-pyridine Aldehydine 5-Ethyl-2-picoline 5-Ethyl-2-methylpyridine> 5-ethyl-2-picolin Aldehydkollidin ALDEHYDINE Nicotinic Acid Impurity C 2-METHYL-5-ETHYLPYRIDINE ALDEHYDE-COLLIDINE MFCD00006344 5-ETHYL-2-METHYL PYRIDINE(M 3-Ethyl-6-methylpyridine 6-Methyl-3-ethylpyridine collidine,aldehydecollidine 5-ethyl-2-methyl-pyridin 5-Ethyl-2-Methylpyridne 5-ETHYL-2-METHYLPYRIDINE (5-ETHYL-2-PICOLINE) Methylethylpyridine T6NJ B1 E2 2,5-Aldehydine 2-Methyl-5-ethylpyridine (M 5-Ethyl-2-methylpyridine >= 5-Ethyl-α-picoline 2-Picoline,5-ethyl Ethyl-5 methyl-2 pyridine 5-Ethyl-alpha-picoline 2-picoL 3-ETHYL-6-METHYLPYRIDINE 2-Picoline, 5-ethyl 5-Ethyl-2-methylpyridine ISO 9001：2015 REACH EINECS 203-250-0 5-Ethyl-2-Methylpyridine Pyridine, 5-ethyl-2-methyl 2-Methyl-5-Ethylyridine 5-Ethyl-2-methylpyri 5-ETHYL-2-PICOLINE Pyridine,5-ethyl-2-methyl 5-ETHYL-2-METHYL PYRIDINE(MEP) FEMA NUMBER

Density	0.9±0.1 g/cm3
Boiling Point	176.0±9.0 °C at 760 mmHg
Melting Point	-70.9 °C
Molecular Formula	C₈H₁₁N
Molecular Weight	121.180
Flash Point	66.1±0.0 °C
Exact Mass	121.089149
PSA	12.89000
LogP	2.18
Vapour density	4.2 (vs air)
Vapour Pressure	1.5±0.3 mmHg at 25°C
Index of Refraction	1.500
Stability	Stable. Hygroscopic. Combustible. Incompatible with strong oxidizing agents.
Water Solubility	practically insoluble

CHEMICAL IDENTIFICATION

RTECS NUMBER :: TJ6825000

CHEMICAL NAME :: 2-Picoline, 5-ethyl-

CAS REGISTRY NUMBER :: 104-90-5

BEILSTEIN REFERENCE NO. :: 0109269

LAST UPDATED :: 199806

DATA ITEMS CITED :: 13

MOLECULAR FORMULA :: C8-H11-N

MOLECULAR WEIGHT :: 121.20

WISWESSER LINE NOTATION :: T6NJ B1 E2

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: Open irritation test

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rabbit

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 368 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 - rat

DOSE/DURATION :: 1000 ppm/4H

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 - rat

DOSE/DURATION :: 826 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 :: 282 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 :: 294 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 :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rabbit

DOSE/DURATION :: 1 mL/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 :: Administration onto the skin

SPECIES OBSERVED :: Rodent - guinea pig

DOSE/DURATION :: 2500 mg/kg

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

MUTATION DATA

TYPE OF TEST :: Sex chromosome loss and nondisjunction

TEST SYSTEM :: Yeast - Saccharomyces cerevisiae

DOSE/DURATION :: 1500 ppm

REFERENCE :: MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 163,23,1986 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-RUSSIA:STEL 2 mg/m3;Skin JAN 1993

Symbol	GHS05, GHS06
Signal Word	Danger
Hazard Statements	H302-H311 + H331-H314
Precautionary Statements	P261-P280-P305 + P351 + P338-P310
Personal Protective Equipment	Faceshields;full-face respirator (US);Gloves;Goggles;multi-purpose combination respirator cartridge (US);type ABEK (EN14387) respirator filter
Hazard Codes	C:Corrosive
Risk Phrases	R20/21/22;R34
Safety Phrases	S26-S36/37/39-S45-S61
RIDADR	UN 2300 6.1/PG 3
WGK Germany	3
RTECS	TJ6825000
Packaging Group	III
Hazard Class	6.1
HS Code	2942000000

Precursor 10
74-86-2 768-44-5 123-63-7 100-97-0
107-25-5 645-62-5 100-52-7 123-72-8
446-52-6 75-34-3
DownStream 10
3764-01-0 110-86-1 109-06-8 536-78-7
108-99-6 589-93-5 5470-70-2 3222-47-7
770-08-1 100-26-5

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%

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