Sigma Fibrinogen from bovine plasma F8630 - Type I-S, 65-85% protein (≥75% of protein is clottable)DOWNLOAD MSDS (PDF) Synonym: Factor I CAS Number: 9001-32-5 type Type: I-S mol wt: α-chain mol wt 63.5 kDa β-chain mol wt 56 kDa γ chain mol wt 47 kDa (about 4% carbohydrate content) soluble dimer mol wt 340 kDa storage temp. −20°C