1.01340
Congo red (C.I. 22120)
pH indicator, Reag. Ph Eur
Synonym(s):
Congo red (C.I. 22120)
About This Item
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product name
Congo red (C.I. 22120), indicator Reag. Ph Eur
Agency
reag. Ph. Eur.
Quality Level
vapor pressure
<1 Pa
form
powder
potency
143 mg/kg LD50, oral (Rat)
loss
≤5% loss on drying, 110°C
color
almost clear to slightly turbid red, 1.0g/L;water
red-brown
pH
6.7 (20 °C, 10 g/L in H2O)
mp
>360 °C
bulk density
600‑700 kg/m3
storage temp.
2-30°C
InChI
1S/C32H24N6O6S2.2Na/c33-31-25-7-3-1-5-23(25)29(45(39,40)41)17-27(31)37-35-21-13-9-19(10-14-21)20-11-15-22(16-12-20)36-38-28-18-30(46(42,43)44)24-6-2-4-8-26(24)32(28)34;;/h1-18H,33-34H2,(H,39,40,41)(H,42,43,44);;/q;2*+1/p-2
InChI key
IQFVPQOLBLOTPF-UHFFFAOYSA-L
Related Categories
Analysis Note
Appearance of solution (1.0 gr/l; water): Almost clear to slightly turbid, red
Transition range: pH 3.0 - pH 5.2violet - orange-red
Loss on drying (110 °C): ≤ 5 %
Sensitivity test: passes test
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Carc. 1B - Repr. 2
Storage Class Code
6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
WGK
WGK 3
Regulatory Listings
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EU REACH SVHC Candidate List
EU REACH Annex XVII (Restriction List)
Certificates of Analysis (COA)
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