Phenol Red Indicator ACS (Sodium Salt / Water Soluble)

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Phenol red (also known as phenolsulfonphthalein or PSP) is a pH indicator frequently used in cell biology laboratories.

  • pH Indicator
  • Etrogen Mimic
  • Water Testing Indicator

Minimum Assay: 90%
Molecular Formula: C19H13NaO5S
Molecular Weight: 376.35 g/mol
Melting Point: 285°C
Transition Range:
pH1.2 (Brownish Orange) – pH 3.0 (Yellow)
pH6.5 (Brownish/Yellow) -pH8.0 (Red/Violet)

Maximum Absorption (pH6.5): 430-435nm
Absorptivity (E1%1cmCell pH6.5): 560-620
Maximum Absorption (pH68.2): 557-560nm
Absorptivity (E1%1cmCell pH8.2): 970-1100
Loss on Drying: <5%

Hazard Phrases: Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Prec Phrases: Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. Store locked up.

Cas No: 34487-61-1
Einecs No: 252-057-8

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Additional information

Weight N/A
Pack Size

10gm, 25gm