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MERCK

MERCK 105228.0005 m-Cresol Purple İndicator (SD.M.105228.0005)

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MERCK 105228.0005 m-Cresol Purple İndicator

 

 
Description
Catalogue Number 105228
Synonyms m-Cresolsulfonphthalein, 2',2''-Dimethylphenolsulfonphthalein, MCP
Product Information
CAS number 2303-01-7
EC number 218-960-6
Hill Formula C₂₁H₁₈O₅S
Molar Mass 382.43 g/mol
HS Code 2934 99 99
Structure formula Image Structure formula Image
Quality Level MQ200
Physicochemical Information
Bulk density 480 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
Identity (UV/VIS-Spectrum) passes test
Appearance of solution (1 g/l; water) passes test
1st transition range pH 1.2 - pH 2.8 pink - yellow
2nd transition range pH 7.4 - pH 9.0 brownish yellow - violet
Absorption maximum λ 1 max. (buffer pH 1,2) 526 - 529 nm
Absorption maximum λ 2 max. (buffer pH 2,8) 431 - 437 nm
Absorption maximum λ 3 max. (buffer pH 7,4) 431 - 439 nm
Absorption maximum λ 4 max. (buffer pH 9,0) 576 - 580 nm
Spec. Absorptivity A 1%/1cm (λ 1 max.; 0.01 g/l; buffer pH 1,2; calc. on dried substances) 750 - 880
Spec. Absorptivity A 1%/1cm (λ 2 max.; 0.01 g/l; buffer pH 2,8; calc. on dried substances) 400 - 470
Spec. Absorptivity A 1%/1cm (λ 3 max.; 0.01 g/l; buffer pH 7,4; calc. on dried substances) 380 - 440
Spec. Absorptivity A 1%/1cm (λ 4 max.; 0.01 g/l; buffer pH 9,0; calc. on dried substances) 700 - 830
Loss on drying (110 °C) ≤ 1 %
Global Trade Item Number
Catalogue Number GTIN
1052280005 04022536866765
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