C8H11N
121.18 g/mol
Industrial ChemicalDanger
5-Ethyl-2-methylpyridine
CAS104-90-5EC203-250-0
Category
Industrial Chemical
Compound Class
Heterocycle
Primary Use
intermediate for nicotinic acid
5-Ethyl-2-methylpyridine is an organic compound that serves as a convenient precursor to nicotinic acid, a form of vitamin B3. It is a colorless liquid produced from simple reagents and is primarily used as an intermediate in industrial chemical manufacturing.
intermediate for nicotinic acid production
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Safety Reference
Danger
H302Harmful if swallowed
H311Toxic in contact with skin
H331Toxic if inhaled
H314Causes severe skin burns and eye damage
H315Causes skin irritation
H317May cause an allergic skin reaction
H319Causes serious eye irritation
H412Harmful to aquatic life with long lasting effects
H227
H318Causes serious eye damage
H336May cause drowsiness or dizziness
H361Suspected of damaging fertility or the unborn child
H402Harmful to aquatic life
H371May cause damage to organs
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for 5-Ethyl-2-methylpyridine (CAS 104-90-5) is 2933.39.
HS code (international, 6-digit)
2933.39
EU CN code (8-digit)
2933 39 99
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
5-ethyl-2-methylpyridine
InChIKey
NTSLROIKFLNUIJ-UHFFFAOYSA-N
SMILES
CCC1=CN=C(C=C1)C
Synonyms (27)
- Nicotinic Acid EP Impurity C
- 2,5-Aldehydine
- 2-METHYL-5-ETHYLPYRIDINE
- 2-Methyl-5-ethylpyridine MEP
- 2-Picoline, 5-ethyl-
- 3-Ethyl-6-methylpyridine
- 5-Ethyl-2-methylpyridine
- 5-Ethyl-2-picoline
- 5-Ethyl-a-picoline
- 5-Ethyl-alpha-picoline
- 6-Methyl-3-ethylpyridine
- Aldehydecollidine
- Aldehydine
- Aldehydkollidin
- Collidine, aldehydecollidine
- ETHYL-2-METHYLPYRIDINE, 5-
- FEMA 3546
- MEP (VAN)
- Methyl ethyl pyridine
- Pyridine, 5-ethyl-2-methyl-
- pyridine, 3-ethyl-6-methyl-
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