- Substance Detail CAS Registry Number 110782-31-5 H335, H331, H319, H315, H311, H301+H311+H331, H301 Key Physical Properties Value Condition Molecular Weight 887.96 - pKa (Predicted) 7.87±0.43 Most Acidic Temp: 25 °C Other Names and Identifiers Canonical SMILES N#CCCOP (OC1C (OC (N2C = NC = 3C (= NC = NC32) NC (= O) C = 4C = CC = CC4) C1OC) COC (C = 5C = CC = CC5) (C6 = CC = C (OC) C = C6) C7 = CC = C (OC) C = C7) N (C (C (C) C (C (OC) C (OC) C (OC) C (C) C (C) C (C) eromicicsomicics) C (OC [C @@ H] 1 [C @@ H] (op (N (C (C) C) C (C) C) OCCC#N) [C @@ H] (OC) [C @@ H] (O1) N2C = 3C (N = C2) = C (NC (= ...