Bromocresol purple, Hi-Cert/ACS, 5 gram

Bromocresol purple hydrophilic dye that is used as a pH indicator which changes color from yellow (at low pH 5.2) to violet (above pH 6.8).

Product Identifier

CAS No. : 115-40-2

EC No. : 204-087-8

Molecular Formula : C₂₁H₁₆Br₂O₅S

Molecular Weight : 540.22

Synonym : 5-5'-Dibromo-o-cresolsulphonphthalein

HS Code : 2934 99 00

Storage : Below 30°C

Shelf life : 4 years

Technical Specification

Appearance : Grey to light purple or pink to yellow-tan crystals or powder

Solubility : 20 ppm in 50% ethanol yields clear solution

Visual pH Transition : pH 5.20 (yellow) - pH 6.80 (purple)

Absorption maxima (pH 5.2) : 426 - 436 nm (20 ppm in 50% ethanol)

Absorption maxima (pH 6.8) : 584 - 594 nm (20 ppm in 50% ethanol)

Specific Absorbance 1 : 400 - 450 (20 ppm in 50% ethanol, at 426 - 436 nm)

Specific Absorbance 2 : 1000 - 1100 (20 ppm in 50% ethanol, at 584 - 594 nm)

Loss on drying (at 110°C, 2 hr) : <= 5.0%

Note :

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Bromocresol purple, Hi-Cert/ACS, 5 gram - ABL

Bromocresol purple, Hi-Cert/ACS, 5 gram - ABL

Rp 389.313

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