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LC261 Alizarin red S mono sodiumsalt (C.I. 58005)

GR for analysis and indicator

 

Order number Packaging Quantity Price €
AC27261 Glass bottle 25 g 32.85
AC27261 Glass bottle 100 g 70.65

 

Product information
Synonyms C.I. 58005, Alizarin Rot S
Hill Formula C14H7NaO7S
HS Code 3204 12 00
EC number 204-981-8
Molar mass 342.26 g/mol
CAS number 130-22-3

 

Chemical and physical data

Solubility (20 °C) soluble
Molar mass 342.26 g/mol

 

Safety information

RTECS CB1095300
Storage class 10 – 13 Other liquids and solids
WGK WGK 2 water endangering
Disposal 3
Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.

 

Specifications
Identity (UV/VIS-Spectrum) passes test
1st transition range pH 4.3 – pH 6.3 Lightly yellow – pink
2nd transition range pH 9.4 – pH 12.0 Brown-orange – violet
Absorption maximum λ 1 (buffer pH 4.3) 418 – 424 nm
Absorption maximum λ 2 (buffer pH 6.3) 514 – 520 nm
Absorption maximum λ 3 (buffer pH 9.4) 444 – 450 nm
Absorption maximum λ 4 (buffer pH 12.0) 554 – 558 nm
Spec. Absorptivity A 1%/1cm
– λ17m7ax; 0.01 g/l; buffer pH 4.3; calc. on dried substance
135 – 180
– λ27m7ax; 0.01 g/l; buffer pH 6.3; calc. on dried substance 160 – 210
– λ37m7ax; 0.01 g/l; buffer pH 9.4; calc. on dried substance 170 – 230
– λ47m7ax; 0.01 g/l; buffer pH 12.0; calc. on dried substance 390 – 520
Loss on drying (110 °C) ≤ 10 %