A single pyridine intermediate feeds four different neonicotinoid insecticides. A single pyrazole acid feeds a whole family of SDHI fungicides. This isn't coincidence — it's the Reaction Interface Economy, the organizing logic behind modern agrochemical R&D and its supply chain.

Corrosive

Toxic

Harmful

Health Hazard

Environmental Hazard

Danger

H290May be corrosive to metals

H301Toxic if swallowed

H311Toxic in contact with skin

H315Causes skin irritation

H319Causes serious eye irritation

H330Fatal if inhaled

H335May cause respiratory irritation

H372Causes damage to organs through prolonged or repeated exposure

H400Very toxic to aquatic life

H410Very toxic to aquatic life with long lasting effects

H314Causes severe skin burns and eye damage

H318Causes serious eye damage

H370Causes damage to organs

Regulatory Compliance1

CN Catalogue of Hazardous ChemicalsCNRegulation
Listed· listed since 2015-05-01Source

Customs Tariff Classification

The international HS code for Paraquat ion (CAS 4685-14-7) is 2933.39, 3808.93.

HS code (international, 6-digit)

2933.39, 3808.93

EU CN code (8-digit)

2933 39 99, 3808 93 27

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

1-methyl-4-(1-methylpyridin-1-ium-4-yl)pyridin-1-ium

InChIKey

INFDPOAKFNIJBF-UHFFFAOYSA-N

SMILES

C[N+]1=CC=C(C=C1)C2=CC=[N+](C=C2)C

Synonyms (30)

KHJ
1,1'-dimethyl-4,4'-bipyridium
Dextrone X
Dimethyl viologen
Methyl viologen (2+)
Methyl viologen ion(2+)
PARAQUAT CATION
PARAQUAT [MART.]
Paraquat dication
Paraquat ion
Spraytop-graze
Starfire
Viologen, Methyl
Weedol

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Paraquat ion

Related Compounds

Related Reading

Safety Reference

Customs Tariff Classification