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For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf
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
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
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Linkage
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
Signal Word
Warning
Hazard Statements
Precautionary Statements
Hazard Classifications
Aquatic Chronic 2 - Eye Irrit. 2
Storage Class Code
11 - Combustible Solids
WGK
WGK 2
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
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’.
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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