ITEM

STANDARD

Appearance

Green brown or brown powder

Flash Point

205.3 °C

PH Change Range

1.2 ( pink ) – 2.8 ( yellow )

7.4 (brown yellow) – 9.0 ( purple )

Mass Absorption Wavelength L/ (cm.g)

λ1 (PH 1.2): 526 - 529 nm    λ2 (PH 2.8): 431 - 437 nm  

λ3 (PH 7.4): 431 - 437 nm   λ4 (PH 9.0): 576 - 580 nm

Mass Absorption Coefficient L/ (cm.g)

α1（λ1, PH 1.2）80-94     α2（λ2, PH 2.8）40-46

α3（λ3, PH 7.4）39-45     α4（λ4, PH 9.0）75-86

Loss on Drying

≤ 1.0%