UN 1835

TETRAMETHYLAMMONIUM HYDROXIDE AQUEOUS SOLUTION with more than 2.5 % but less than 25 % tetramethylammonium hydroxide

Class 8 — Corrosive SubstancesPacking Group II2 variants
UN 1835 has 2 classification variants in ADR 2025 — different hazard divisions or descriptions for the same UN number. Each variant may have different transport requirements.
UN 1835Class 8 — Corrosive SubstancesPG IIVariant 1 of 2
TETRAMETHYLAMMONIUM HYDROXIDE AQUEOUS SOLUTION with more than 2.5 % but less than 25 % tetramethylammonium hydroxide
Packing Group
II
Medium danger
Classification Code
CT1
Tunnel Code
(E)
Code governing tunnel passage
Transport Category
2
For the 1,000-point rule (0 = highest restriction)
Hazard ID No.
86
Kemler code
Limited Quantity
1 L
Max per inner package for LQ relief
Excepted Quantity
E2
EQ code for excepted quantity relief
Hazard Labels Required
Label 8Label 6.1

These labels must be displayed on packages and vehicle placards in accordance with ADR 2025.

Special Provisions
SP 279SP 408

Refer to ADR 2025 Chapter 3.3 for full text of each provision.

UN 1835Class 8 — Corrosive SubstancesPG IIIVariant 2 of 2
TETRAMETHYLAMMONIUM HYDROXIDE AQUEOUS SOLUTION with not more than 2.5 % tetramethylammonium hydroxide
Packing Group
III
Low danger
Classification Code
C7
Tunnel Code
(E)
Code governing tunnel passage
Transport Category
3
For the 1,000-point rule (0 = highest restriction)
Hazard ID No.
80
Kemler code
Limited Quantity
5 L
Max per inner package for LQ relief
Excepted Quantity
E1
EQ code for excepted quantity relief
Hazard Labels Required
Label 8

These labels must be displayed on packages and vehicle placards in accordance with ADR 2025.

Special Provisions
SP 408

Refer to ADR 2025 Chapter 3.3 for full text of each provision.

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Other Corrosive Substances (Class 8)

UN 1052
HYDROGEN FLUORIDE, ANHYDROUS
UN 1604
ETHYLENEDIAMINE
UN 1715
ACETIC ANHYDRIDE
UN 1716
ACETYL BROMIDE
UN 1718
BUTYL ACID PHOSPHATE
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📅Data: UNECE ADR 2025 (ECE/TRANS/352), via EU Directive 2008/68/EC. Last verified July 2026

ADR reference data only. Classification is the consignor's legal responsibility. Consult a DGSA for compliance decisions.

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