UN 1855 — ADR 2025 Table A: class 4.2, classification code S4, packing group I, labels 4.2, special provisions —, limited quantity 0, excepted quantity E0, packing instructions P404, transport category 0, tunnel restriction code (E), hazard identification number —.

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

Table A — ADR 2025 (ECE/TRANS/352), UN 1855
(1) UN No.	1855
(2) Name and description	CALCIUM, PYROPHORIC or CALCIUM ALLOYS, PYROPHORIC
(3a) Class	4.2
(3b) Classification code	S4
(4) Packing group	I
(5) Labels	4.2
(6) Special provisions	—
(7a) Limited quantities	0
(7b) Excepted quantities	E0
(8) Packaging: packing instructions	P404
(9a) Packaging: special packing provisions	—
(9b) Packaging: mixed packing provisions	MP13
(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)	0 (E)
(16) Special provisions for carriage: packages	V1
(17) Special provisions for carriage: bulk	—
(18) Special provisions for carriage: loading, unloading and handling	—
(19) Special provisions for carriage: operation	S20
(20) Hazard identification No.	—

ADR 2027 (accepted) — no change for UN 1855

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.

This entry under ADR 2027 on the API: /api/adr?un=1855&edition=2027 (editions and as_of).

ADR 2025 is the edition that applies until ADR 2027 takes effect on 1 January 2027, and FreightUtils answers on it by default until then; the API answers on ADR 2027 now with edition=2027. After that date, 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 (E): in tanks, Prohibited in E; in other carriage, Prohibited in E. Every category except E. (ADR 8.6.4; from the ADR table itself)
Small-load exemption: Transport category 0: no 1.1.3.6 exemption applies (ADR 1.1.3.6.3; from the ADR table itself)
Labels: Labels: model 4.2 (Substances liable to spontaneous combustion) (ADR 5.2.2.2.2, label model No. 4.2; paraphrase, not yet reviewed)
Packing: Packing instruction P404: Pyrophoric solids: sealed metal (15 kg) or canned glass (1 kg) inners in 125 kg outers, metal or composite packagings to 150 kg gross, or pressure receptacles. Mixed packing provision MP13: Up to 3 kg per inner packaging and per package may be mixed with goods of other codes or classes that permit it, or with non-ADR goods. (ADR 4.1.4.1, P404, 4.1.10.4, MP13; paraphrase, not yet reviewed)
Carriage: Carriage provision V1: Packages must go on a closed or sheeted vehicle or in a closed or sheeted container; open vehicles and containers are not allowed. Operation provision S20: Chapter 8.4 supervision applies above 10 000 kg in packages, or above 3 000 litres in tanks. (ADR 7.2.4, V1, 8.5, S20; 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 4.2 — Flammable SolidsPacking Group I

UN 1855Class 4.2 — Flammable SolidsPG I