Photochromic lenses are optical lenses that darken on exposure to specific types of light of sufficient intensity, most commonly ultraviolet (UV) radiation. In the absence of activating light the lenses return to their clear state.
O/P-Toluene Sulfonamide Chemical name:O/P-Toluene Sulfonamide Molecular Formula:C7H9NO2S Molecular Weight:171.22 CAS Number:1333-07-9/8013-74-9 Structural type Specification Properties: Non-volatile. Stable in neutral, acidic or alkaline solutions. Applic