ALIZARINE AR (pH INDICATOR) (C. I. NO. 58000)^*

Article No.	Grade	Purity	Cas no.	Molecular Formula	Molecular Weight	H.S. Code	Shelf Life
A0016200100	AR		72-48-0	C₁₄H₈O₄	240.22	2914.7990	60 Months

Physical Properties

Physical state at 20 °C

Solid

Colour

Orange powder

pH value

5 - 7.2

Melting Point/ Freezing point [°C]

279 - 283 °C

Boiling point [°C]

430°C

Solubility in water [% weight]

Sparingly soluble in water

Appearance:	Orange colored powder
Sulphated ash:	Max 1%
Loss on drying:	Max 5%
Absorption maxima in NaOH 0.01 mol/L (lmax1):	564 - 568 nm
Absorption maxima in NaOH 0.01 mol/L (lmax2):	605 - 609 nm
pH 5.5- 6.8:	Yellow to reddish-violet
Absorptivity (A 1%/1cm; at lmax2):	Min 525
Absorptivity (A 1%/1cm; at lmax1):	Min 625

Symbol: GHS07
Signal Word: Warning
Hazardous Statement: H302-H319
Precaution Statement: P305 + P351 + P338