Cas number 1733-12-6
Molecular formula C21H18O5S
Molecular weight 382.42
Cvesol red
Dark red, reddish brown or brownish green powder, easily soluble in alcohol and dilute alkaline hydroxide solution, slightly soluble in water, its 0.1% alcohol solution or 0.04% sodium salt solution is used as an indicator. GB / T 15348-94
Item indicator
(Ind)
pH color change range Visual transition interval 6.5 (yellow) ~ 8.5 (purple)
Maximum absorption wave length
λ1 (pH6.5) 432 ～ 436
λ2 (pH8.5) 571 ～ 574
Mass absovptivity
α1 (λ1, pH6.5 dry sample) 49 ～ 67
α2 (λ2, pH8.5 dry sample) 100 ～ 132
Ethanol dissolution test Solubility (in ethanol) Qualified drying loss,% ≤3.0
Ignition residue (calculated as sulfate) Ignition residue,% ≤0.2 sealed and stored.
Product use acid-base indicator.
Gift Set,Diffuser Gift Set,Aroma Diffuser Gift Set,Home Fragrance Set
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