The UN code for this kind of hazardous item.

Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
udt:CodeType
Example value
ADR
Code lists
Dangerous goods regulations code (UNCL8273)
Rules
Identifier/Error message Flag
PEPPOL-T124-B62401
Value MUST be part of code list 'Dangerous goods regulations code (UNCL8273)'.
fatal