1.02498
Chromotropic acid disodium salt dihydrate
for analysis ACS,Reag. Ph Eur
Synonym(s):
Chromotropic acid disodium salt dihydrate, 4,5-Dihydroxy-2,7-naphthalene disulfonic acid sodium salt
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grade
ACS reagent
Quality Level
agency
reag. Ph. Eur.
assay
≥98.5% (acidimetric)
form
solid
composition
Water, 8.5-9.5% Karl Fischer
color
gray-white to brownish white
pH
3.6 (20 °C, 10 g/L in H2O)
mp
>300 °C
bulk density
780 kg/m3
storage temp.
2-30°C
SMILES string
[S](=O)(=O)(O)c1cc2c(c(c1)[O-])c(cc(c2)[S](=O)(=O)O)[O-]
InChI
1S/C10H8O8S2/c11-8-3-6(19(13,14)15)1-5-2-7(20(16,17)18)4-9(12)10(5)8/h1-4,11-12H,(H,13,14,15)(H,16,17,18)/p-2
InChI key
HLVXFWDLRHCZEI-UHFFFAOYSA-L
1 of 4
This Item | 59828 | 126225 | 1.01922 |
|---|---|---|---|
| grade ACS reagent | grade reagent grade | grade technical grade | grade - |
| agency reag. Ph. Eur. | agency - | agency - | agency - |
| assay ≥98.5% (acidimetric) | assay ≥95.0% | assay ≥78.5% | assay - |
| form solid | form - | form powder | form solid |
| composition Water, 8.5-9.5% Karl Fischer | composition - | composition - | composition Water, 4.5-6.5% Karl Fischer |
| color gray-white to brownish white | color - | color - | color - |
Linkage
Analysis Note
Assay (acidimetric, calc. on anhydrous substance): ≥ 98.5 %
Identity (IR-spectrum): passes test
Appearance of solution (5 %; water): passes test
Water (according to Karl Fischer): 8.5 - 9.5 %
Sensitivity (of formaldehyde): passes test
Sensitivity (of nitrate): passes test
signalword
Warning
hcodes
Hazard Classifications
Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
target_organs
Respiratory system
Storage Class
11 - Combustible Solids
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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