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
About This Item
Recommended Products
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
Related Categories
1 of 4
This Item | 09833 | 101201 | 101187 |
|---|---|---|---|
| assay ≥98.0% (NT) | assay ≥99.0% (T) | assay ≥98.0% (iodometric) | assay ≥95.0% (alkalimetric) |
| form (powder or powder with lumps) | form powder or crystals | form solid | form solid |
| mp 153-155 °C (lit.) | mp - | mp 120 °C (decomposition) | mp 169 °C |
| cation traces Bi: ≤10 mg/kg | cation traces Al: ≤5 mg/kg, As: ≤0.1 mg/kg, Ba: ≤5 mg/kg, Bi: ≤5 mg/kg, Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤50 mg/kg, Li: ≤5 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, Mo: ≤5 mg/kg, Na: ≤50 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Sr: ≤5 mg/kg, Zn: ≤5 mg/kg | cation traces Fe: ≤0.001%, Mn: ≤0.00005%, heavy metals (as Pb): ≤0.001% | cation traces Ca: ≤0.005%, Fe: ≤0.0005%, Mg: ≤0.001%, heavy metals (as Pb): ≤0.001% |
| Quality Level 200 | Quality Level 200 | Quality Level 300 | Quality Level 200 |
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
Signal Word
Warning
Hazard Statements
Precautionary Statements
Hazard Classifications
Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
Target Organs
Respiratory system
Storage Class Code
11 - Combustible Solids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Certificates of Analysis (COA)
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