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Classification: Phosphoric Acid
CAS No.: 7697-37-2
Other Names: Aqua Fortis and Spirit of Niter
Place of Origin: India
Grade Standard: Agriculture Grade, Food Grade, Industrial Grade
Purity: 68%
Appearance: Colorless Liquid
Application: Agriculture Grade, Industrial Grade
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Dye Content (by Spectrophotometry) = >95%
Transition Range = pH 6.5-8.8 ,Yellow-Purple
Solubility 0.1% (95% EtOH) = Clear solution
Absorption maximum (pH 6.5) ?1max = 432-436nm
Absorption maximum (pH 8.8) ?2max = 571-574nm
Absorptivity (A1%/1cm at pH 6.5 at ?1max) = 490-540
Absorptivity (A1%/1cm at pH 8.8 at ?2max) = 1000-1100
Loss On Drying (110�°C) = <3%
Product Description:
Cresol red (full name: o-cresolsulfonephthalein) is a dye C21H18O5S of the sulfone phthalein series derived from ortho-cresol that is obtained as a reddish brown crystalline powder and is used as an acid-base indicator. It is a triarylmethane dye frequently used for monitoring the pH in aquaria.
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