Index Name

Specifications

Appearance

grey to yellowish crystal

longest absorb wavelength(nm)入 (ph3.8)

440 to 445

longest absorb wavelength(nm)入 (ph5.4)

615 to 618

quality absorb coefficiant(l/cm.g)a(入 PH3.8)

24 to 28

quality absorb coefficiant(l/cm.g)a(入 PH5.4)

53 to 58

color change range(PH)

3.8(yellow-green) to 5.4(blue)

Insoluble in Ethyl Alcohol,%

pass

loss on drying

3.0%max

Ash(as SO4)

0.25%max