Basic

CAS No.	4159-77-7
Product Name	rose bengal lactone
Synonyms	Rose bengal B; 4,5,6,7-Tetrachloro-3',6'-dihydroxy-2',4',5',7'-tetraiodospiro(isobenzofuran-1(3H),9'-(9H)xanthene)-3-one; Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4,5,6,7-tetrachloro-3',6'-dihydroxy-2',4',5',7'-tetraiodo-; 4,5,6,7-tetrachloro-3',6'-dihydroxy-2',4',5',7'-tetraiodo-3H-spiro[2-benzofuran-1,9'-xanthen]-3-one
Molecular Formula	C20H4Cl4I4O5
Molecular Weight	973.6726

Physical property

Density	2.96g/cm3
Melting point	280℃
Boiling point	741.8°C at 760 mmHg
Flash point	402.4°C
Refractive index	1.955