ALIZARINE RED S AR

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Category: Adsorption Indicators

Description
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Description

C.I.No. 58005 Acid base indicator use in analysis of metals
Sodium Alizarine Sulphonate

Article No.	00861	Grade	AR
Purity		CAS No.	130-22-3
Molecular Formula	C₁₄H₇NaO₇S	Molecular Weight	342.3
H.S. Code	2914.7990	Shelf Life	60 Months

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Physical Properties

Physical state at 20 °C	Solid	Colour	Red powder
Melting point/ Freezing point [°C]	430°C	Boiling point [°C]	287 – 289°C
Initial boiling point [°C]	287°C	Final boiling point [°C]	289°C
Solubility in water [% weight]	Sparingly soluble in water

Specifications

Appearance	Yellow to orange to brown powder
Dye content	Min 70.0%
Transition range
pH 4.3-6.3	Yellow-Pink
pH 9.4-12.0	Brown orange-Violet
Solubility (0.1% in water)	Clear solution
Absorption maxima (0.1 mol/L in NaOH) λmax1	553-559 nm
Absorption maxima (0.1 mol/L in NaOH) λmax2	592-599 nm
Absorptivity (A1%/1cm at 556 nm )	Min 350.0
Absorptivity (A1%/1cm at 595 nm )	Min 325.0
Loss on drying (at 110°C)	Max 5.0%

Packings

25 g	00025
100 g	00100

Safety Information

Symbol: GHS07
Signal Word: Warning
Hazardous Statement: H315-H319-H335
Precaution Statement: P261-P302+P352-P305+P351+P338

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