1.01340
Congo red (C.I. 22120)
pH indicator, Reag. Ph Eur
Synonym(s):
Congo red (C.I. 22120)
Select a Size
About This Item
Skip To
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
SMILES string
[Na+].[Na+].[S](=O)(=O)([O-])c1c2c(c(c(c1)N=Nc3ccc(cc3)c4ccc(cc4)N=Nc5c(c6c(c(c5)[S](=O)(=O)[O-])cccc6)N)N)cccc2
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
1 of 4
This Item | 1.01369 | C6277 | 1.06076 |
|---|---|---|---|
| agency reag. Ph. Eur. | agency - | agency - | agency reag. Ph. Eur., suitable for SM 4500 - NH3 |
| vapor pressure <1 Pa | vapor pressure - | vapor pressure - | vapor pressure - |
| form powder | form solid | form powder | form powder, solid |
| potency 143 mg/kg LD50, oral (Rat) | potency - | potency - | potency - |
| loss ≤5% loss on drying, 110°C | loss ≤18% loss on drying, 110°C | loss - | loss ≤5% loss on drying, 110°C |
| color almost clear to slightly turbid red, 1.0g/L;water | color - | color - | color red to red-violet |
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
signalword
Danger
hcodes
Hazard Classifications
Carc. 1B - Repr. 2
Storage Class
6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
wgk_germany
WGK 3
Certificates of Analysis (COA)
Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.
Already Own This Product?
Find documentation for the products that you have recently purchased in the Document Library.
Active Filters
Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.
Contact Technical Service