C.I.220
CAS：16470-24-9
Chemical formula：C40H40N12O16S4Na4
Relative Molecular Weight : 1165.12 (According to 1997 International Relative Atomic Mass)
The maximum UV absorption wavelength：350nm
(Implementation of standards):HG/T 3727-2003
SPECIFICATION:
| Item | Indices |
| Appearance | Pearl transparent liquid |
| Fluorescent intensity (equivalent to standard Product 370) | 35 |
| Whiteness s(WCIE) (equivalent to standard product ) | -3 |
| Viscosity (25℃), MPas | ≤ 50 |
| pH value | 8-10 |
| Density, g/cm³ | 1.1-1.2 |
| Ionicity | Anionic |
