In the international standard classification, sn1628 involves: Plastics.
Professional Standard - Commodity Inspection, sn1628
SN/T 1628-2005 Determination of closantel residues in meat and meat products for import and export--HPLC
CH-SNV, sn1628
SN EN ISO 1628-2:2020 Plastics - Determination of the viscosity of polymers in dilute solution using capillary viscometers - Part 2: Poly(vinyl chloride) resins (ISO 1628-2:2020)
SN EN ISO 1628-1:2021 Plastics - Determination of the viscosity of polymers in dilute solution using capillary viscometers - Part 1: General principles (ISO 1628-1:2021)