1.03170
Eriochrome black T (C.I. 14645)
metal indicator, ACS, Reag. Ph Eur
Synonym(s):
Eriochrome black T (C.I. 14645), Chrome black T, 2-Hydroxy-1-(1-hydroxy-2-naphthylazo)-6-nitronaphthalene-4-sulfonic acid sodium salt
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About This Item
Product Name
Eriochrome black T (C.I. 14645), indicator for complexometry ACS,Reag. Ph Eur
grade
ACS reagent
Quality Level
agency
reag. Ph. Eur.
form
powder
potency
17590 mg/kg LD50, oral (Rat)
loss
≤7% loss on drying, 110°C
color
black to dark brown
pH
3.7 (20 °C, 10 g/L in H2O)
solubility
50 g/L
bulk density
400‑600 kg/m3
λmax
612-616 nm (buffer pH 10.0)
storage temp.
15-25°C
SMILES string
[Na+].[S](=O)(=O)(O)C1=CC(=O)\C(=N/Nc3c(c4c(cc3)cccc4)[O-])\c2c1cc(cc2)[N+](=O)[O-]
InChI
1S/C20H13N3O7S.Na/c24-17-10-18(31(28,29)30)15-9-12(23(26)27)6-7-14(15)19(17)22-21-16-8-5-11-3-1-2-4-13(11)20(16)25;/h1-10,21,25H,(H,28,29,30);/q;+1/p-1/b22-19-;
InChI key
JHUJLRKQZAPSDP-GXTSIBQPSA-M
Analysis Note
Appearance: Black to dark brown-black fine powder, eventually with granular parts
Clarity of solution: passes test
Absorption maximum λmax. (buffer pH 10.0): 612 - 616 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.02 g/l; buffer pH 10.0; calc. on dried substance): 400 - 510
Loss on drying (110 °C): ≤ 7 %
Suitability as indicator (for complexometric titration, ACS): passes test
Suitability as indicator (Reag. Ph Eur): passes test
Other Notes
signalword
Warning
hcodes
Hazard Classifications
Aquatic Chronic 2 - Eye Irrit. 2
Storage Class
11 - Combustible Solids
wgk
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
Certificates of Analysis (COA)
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