PYROGALLOL RED^*

Article No.	Grade	Purity	Cas no.	Molecular Formula	Molecular Weight	H.S. Code	Shelf Life
P0172700001	AR		32638-88-3	C₁₉H₁₂O₈S	400.04	2934.9900	60 Months

Physical Properties

Physical state at 20 °C

Solid

Colour

Dark brown powder

Melting Point/ Freezing point [°C]

>= 300 °C

Initial Boiling Point [°C]

148°C

Final Boiling Point [°C]

150 °C

Boiling point [°C]

148 - 150 °C

Density [g/cm3]

0.988

Solubility in water [% weight]

Insoluble in water

Appearance:	Green to brown colored powder
Loss on dryig (at 135°C):	Max 5%
Residue on ignition (as SO4):	Max 1%
Absorption maxima in pyridine/water:	540 - 546 nm

Safety Statement: 22-24/25