What is PIN on an MSDS?
The Product Identification Number (PIN) called for on an MSDS is any identification number that the manufacturer/supplier has for identifying this specific product or product line. It is very often confused with the PIN (also commonly known as the UN#) for TDG purposes. It is advisable to identify the UN# in the other hazard information seen in section 8 (Leak and Spill information) and reserve the identification number box for the supplier’s own information.