UN 3522

ARSINE, ADSORBED

UN 3522 — ADR 2025 Table A: class 2, classification code 9TF, packing group —, labels 2.3 +2.1, special provisions —, limited quantity 0, excepted quantity E0, packing instructions P208, transport category 1, tunnel restriction code (D), hazard identification number —.

UNECE ADR 2025, ECE/TRANS/352 · checked 2026-10-28

Table A — ADR 2025 (ECE/TRANS/352), UN 3522
(1) UN No.3522
(2) Name and descriptionARSINE, ADSORBED
(3a) Class2
(3b) Classification code9TF
(4) Packing group—
(5) Labels2.3 +2.1
(6) Special provisions—
(7a) Limited quantities0
(7b) Excepted quantitiesE0
(8) Packaging: packing instructionsP208
(9a) Packaging: special packing provisions—
(9b) Packaging: mixed packing provisionsMP9
(10) Portable tanks and bulk containers: instructions—
(11) Portable tanks and bulk containers: special provisions—
(12) ADR tank: tank code—
(13) ADR tank: special provisions—
(14) Vehicle for tank carriage—
(15) Transport category (Tunnel restriction code)1 (D)
(16) Special provisions for carriage: packages—
(17) Special provisions for carriage: bulk—
(18) Special provisions for carriage: loading, unloading and handlingCV9 CV10 CV36
(19) Special provisions for carriage: operationS2 S14
(20) Hazard identification No.—

ADR 2027 (accepted) — no change for UN 3522

ADR 2027 was accepted: depositary notification C.N.395.2026 (9 October 2026) records no objection to the amendments proposed by C.N.252.2026. It applies from 1 January 2027, and ADR 2025 may still be applied until 30 June 2027 (1.6.1.1). (C.N.395.2026)

ADR 2027: no Table A change for this entry (checked against ECE/TRANS/WP.15/274, Add.1 and Corr.1). Other parts of ADR 2027 may still affect its carriage.

ADR 2025 remains the edition FreightUtils serves and the one that applies until ADR 2027 takes effect on 1 January 2027; after that, ADR 2025 may still be applied until 30 June 2027 (1.6.1.1).

All ADR 2027 Table A changes →Check a list of UN numbers →

In plain words

Tunnels
Tunnel code (D): in tanks, Prohibited in D, E; in other carriage, Prohibited in D, E. Categories A, B, C. (ADR 8.6.4; from the ADR table itself)
Small-load exemption
Transport category 1: at most 20 per transport unit under 1.1.3.6, counted ×50 toward the 1,000-point limit (ADR 1.1.3.6.3; from the ADR table itself)
Labels
Labels: model 2.3 (Gases: toxic gases), model 2.1 (Gases: flammable gases) (ADR 5.2.2.2.2, label model No. 2.3, 5.2.2.2.2, label model No. 2.1; paraphrase, not yet reviewed)
Packing
Packing instruction P208: Adsorbed gases in ISO 11513 / ISO 9809-1 cylinders: below 101.3 kPa at 20 °C and 300 kPa at 50 °C, min 21 bar test, 5-year inspections. Mixed packing provision MP9: May share a combination outer packaging with other Class 2 goods, with other classes that permit it, or with non-ADR goods. (ADR 4.1.4.1, P208, 4.1.10.4, MP9; paraphrase, not yet reviewed)
Carriage
Loading provision CV9: Do not throw packages or subject them to impact; stow receptacles so they cannot tip over or fall. Loading provision CV10: Cylinders lie along or across the vehicle axis (across at the front wall); stable or secured ones may stand; flat ones must be wedged. Loading provision CV36: Prefer open or ventilated units; if closed, isolate the cab from the load and mark doors "WARNING NO VENTILATION OPEN WITH CAUTION" (≥ 25 mm). Operation provision S2: Flammable liquids/gases: no ordinary portable lights in closed load compartments; FL heaters off during loading; earth FL vehicles before filling. Operation provision S14: Chapter 8.4 vehicle supervision applies for any amount of these substances. (ADR 7.5.11, CV9, 7.5.11, CV10, 7.5.11, CV36, 8.5, S2, 8.5, S14; paraphrase, not yet reviewed)

Assembled from FreightUtils' meanings of the Table A codes, not the official text. A statement marked “not yet reviewed” has not yet been checked against ADR by a person.

Class 2 — Gases
UN 3522Class 2 — Gases
Packing Group
N/A
Not applicable
Classification Code
9TF
Tunnel Code
(D) meaning →
Code governing tunnel passage
Transport Category
1
For the 1,000-point rule (0 = highest restriction)
Hazard ID No.
—
Kemler code
Limited Quantity
0
Max per inner package for LQ relief
Excepted Quantity
E0
EQ code for excepted quantity relief
Thresholds — why, not just the verdict
Transport Category
Category 1
×50 points per kg/L — up to 20 kg/L of this substance alone stays under the 1,000-point threshold
Per-substance max
20 kg/L
Per-substance maximum for 1.1.3.6 relief (1.1.3.6.3)
Limited Quantity
Not permitted
No limited-quantity relief for this entry (Chapter 3.4)
Excepted Quantity
E0
No excepted-quantity relief for this entry (Chapter 3.5)
Tunnel Code
Governs which tunnel categories the load may pass
Hazard Labels Required
Label 2.3Label 2.1

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

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Other Gases near UN 3522 (Class 2)

UN 3519
BORON TRIFLUORIDE, ADSORBED
UN 3520
CHLORINE, ADSORBED
UN 3521
SILICON TETRAFLUORIDE, ADSORBED
UN 3523
GERMANE, ADSORBED
UN 3524
PHOSPHORUS PENTAFLUORIDE, ADSORBED
All Class 2 UN numbers →
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📅Data: UNECE ADR 2025 (ECE/TRANS/352), via EU Directive 2008/68/EC. Last verified October 2026

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

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