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Selenious acid CAS 7783-00-8
MF: H2O3Se MW: 128.97 CAS: 7783-00-8 -
BTDA CAS: 2421-28-5 3,3′,4,4'-Benzophenonetetracarboxylic dianhydride
Sunan samfur 3,3',4,4,4'-Benzophenonetetracarboxylic dianhydride Gajarta BTDA Cas No. 2421-28-5 Bayyanar Tsafta ≥98% Metal ion Tsarin kwayoyin halitta