The sum of the atomic weights represented in a chemical formula. Thus, since the atomic weight of hydrogen is 1 and that of oxygen is 16, the formula weight of water (H2O) is 18 (approximate atomic weights used).
Hangzhou ZeErRui Chemical Co., Ltd. Hangzhou ZeErRui Chemical Co., Ltd. located in Lingang industrial areas, our plant covers an area of 6000 square me.. Tianjin YR ChemSpec Technology Co.,Ltd. YR Chemspec?is a qualified manufacturer and supplier which audited and approved by SGS and ISO,we are strictly foll..