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Selenious acid CAS 7783-00-8
MF: H2O3 Se MW: 128.97 Nws CAS: 7783-00-8 ib -
BTDA CAS: 2421-28-5 3,3′,4,4′-Benzophenonetetracarboxylic dianhydride
Khoom npe 3,3′,4,4′-Benzophenonetetracarboxylic dianhydride Cov ntawv luv BTDA Cas No. 2421-28-5 : kuv Qhov tshwm sim Purity ≥98% Hlau Ion Cov mis mos molecular