49 CFR 172 Special Provision N88 (N-Codes)

These provisions apply only to non-bulk packagings.

Code	N88
Description	Any metal part of a UN pressure receptacle in contact with the contents may not contain more than 65% copper, with a tolerance of 1%.
HazMat with this Code	UN 1001 - Acetylene, dissolved UN 2452 - Ethylacetylene, stabilized UN 1060 - Methyl acetylene and propadiene mixtures, stabilized