<h1>Standard Input-Output Norms require proportional input verification to ensure imported chemical inputs match declared export uses.</h1> Standard Input-Output Norms for Chemical & Allied Products require determination of proportions of inputs usable or required in manufacture of export products and oblige applicants to ensure that imported goods are those used or required in the declared export product. The SION entry for Magnesium Perchlorate Hexahydrate (A2916) has been suspended by public notice and specifies input quantities.