Tropaeolin O (C.I. 14270) CAS 547-57-9

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CAS: 547-57-9

MF: C₁₂H₉N₂NaO₅S

MW: 316.27

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Physical Description	Orange to brown powder
Solubility (0.1% in water)	Clear, yellow to orange solution
pH Transition Range	11.2 - 12.2 (yellow to orange)
Wavelength of Maximum Absorption (λmax)	482.0 - 492.0 nm (in 0.1M NaOH)
Absorptivity (1%/1cm)	≥ 530 (at λmax)
Loss on Drying	≤ 10.0% (110°C, 1h)
Specification Version	1.0

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