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MERCK

MERCK 105225.0005 Cresol Red İndicator (SD.M.105225.0005)

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MERCK 105225.0005 Cresol Red İndicator

Description
Catalogue Number	105225
Synonyms	o-Cresolsulfonphthalein

Product Information
CAS number	1733-12-6
EC number	217-064-2
Grade	Reag. Ph Eur
Hill Formula	C₂₁H₁₈O₅S
Molar Mass	382.43 g/mol
HS Code	2934 99 99
Structure formula Image
Quality Level	MQ200

Physicochemical Information
Density	0.998 g/cm3
Melting Point	290 °C decomposes
Bulk density	600 - 620 kg/m3

Safety Information according to GHS
Storage class	10 - 13 Other liquids and solids
WGK	WGK 3 highly hazardous to water
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.

Storage and Shipping Information
Storage	Store at +2°C to +30°C.

Specifications
Appearance of solution(0,5 g/l; ethanol)	passes test
Identity (UV/VIS-Spectrum)	passes test
1st transition range	pH 0.5 - pH 2.5 pink - brownish yellow
2nd transition range	pH 6.5 - pH 8.5 yellow - purple
Absorption maximum λ 1 _max. (buffer pH 0.5)	517 - 520 nm
Absorption maximum λ 2 _max. (buffer pH 2.5)	432 - 436 nm
Absorption maximum λ 3 _max. (buffer pH 6.5)	432 - 436 nm
Absorption maximum λ 4 _max. (buffer pH 8.5)	571 - 574 nm
Spec. Absorptivity A 1%/1cm (λ 1 _max.; 0.005 g/l; buffer pH 0.5; calc. on dried substances)	≥ 1200
Spec. Absorptivity A 1%/1cm (λ 2 _max.; 0.005 g/l; buffer pH 2.5; calc. on dried substances)	490 - 570
Spec. Absorptivity A 1%/1cm (λ 3 _max.; 0.005 g/l; buffer pH 6.5; calc. on dried substances)	490 - 610
Spec. Absorptivity A 1%/1cm (λ 4 _max.; 0.005 g/l; buffer pH 8.5; calc. on dried substances)	1000 - 1190
Loss on drying (110 °C)	≤ 5 %
Sensitivity test	passes test

Global Trade Item Number
Catalogue Number	GTIN
1052250005	04022536062419
1052250025	04022536062426

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