Calcium, pyrophoric or Calcium alloys, pyrophoric

Calcium is a chemical element; it has symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. It is the fifth most abundant element in Earth's crust, and the third most abundant metal, after iron and aluminium. Wikipedia

Hazardous Materials Table

(3) Hazard Class 4.2 Spontaneously combustible materials	(4) Identification number UN 1855	(5) Packing Group I
(6) Labels
(7) Special Provisions (§172.102) ×Note: Special provisions may be very complex. The extracts are taken from 49 CFR §172.102. Please be careful with the information, as necessary, additional conditions may be applied that are not written here. Please check the original source and report bugs. W31 Non-bulk packagings must be hermetically sealed. Browse special provision W31
(8) Packing Authorizations (§173.***) (8A) Exceptions None (8B) Non-bulk 187 see 49 CFR §173.187 (8C) Bulk None
(9) Quantity Limits (9A) Passenger aircraft/rail Forbidden (9B) Cargo aircraft only Forbidden
(10) Vessel stowage (10A) Location D Stowage category “D” means the material must be stowed “on deck only” on a cargo vessel or on a passenger vessel carrying a number of passengers limited to not more than the larger of 25 passengers or one passenger per each 3 m of overall vessel length, but the material is prohibited on a passenger vessel in which the limiting number of passengers is exceeded. Source: 49 CFR §172.101(k) (10B) Other 13 see 49 CFR §176.84 148 see 49 CFR §176.84 Source: 49 CFR §176.84

Segregation chart for load, transport, and storage

This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.

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Hazard class	8	7	6.1	5.2	5.1	4.3	4.2	4.1	3	2.3B	2.3A	2.2	2.1	1.6	1.5	1.4	1.3	1.1/1.2
1.1/1.2
1.3
1.4
1.5
1.6
2.1
2.2
2.3A
2.3B
3
4.1
4.2
4.3
5.1
5.2
6.1
7
8

	Must not be loaded, transported, or stored together in the same vehicle or facility.
	May be loaded, transported, or stored together.
	May be loaded, transported, or stored together only with restrictions.