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Potassium dichromate

volumetric standard, secondary reference material for redox titration, traceable to NIST SRM Certipur® Reag. USP

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Synonym(s):
Potassium dichromate, Potassium bichromate, Potassium pyrochromate
Empirical Formula (Hill Notation):
Cr2K2O7
CAS Number:
Molecular Weight:
294.18
MDL number:
UNSPSC Code:
41116107
EC Index Number:
231-906-6
NACRES:
NA.24

agency

ISO 17025
reag. USP

Quality Level

form

solid

potency

90.5 mg/kg LD50, oral (Rat)
1170 mg/kg LD50, skin (Rat)

technique(s)

titration: suitable

pH

3.6 (100 g/L in H2O)

bp

>500 °C/1013 hPa

mp

398 °C

density

2.7 g/cm3 at 20 °C

bulk density

1250 kg/m3

storage temp.

15-25°C

InChI

1S/2Cr.2K.7O/q;;2*+1;;;;;;2*-1

InChI key

KMUONIBRACKNSN-UHFFFAOYSA-N

General description

Potassium dichromate is a volumetric standard manufactured under stringent conditions and measured with the highest possible precision. Its mass fraction is determined by potentiometric titration, and it is qualified in a DIN EN ISO/IEC 17025 accredited laboratory.

Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.

Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.

Application

It finds its use as a certified reference material (CRM) for the standardization of volumetric solutions in redox titrations, according to USP and Ph. Eur.

Features and Benefits

  • Available as a solid in a secure glass bottle to ensure its stability for the entire shelf life until opened.
  • Certified reference material according to ISO 17034
  • High-purity material traceable to NIST SRMs
  • Qualified in a DIN EN ISO/IEC 17025 accredited laboratory
  • In accordance with the chapter reagents of USP and Ph. Eur
  • High-quality offering accurate titer determinations
  • Accompanied by a certificate of analysis (CoA)

Packaging

SKU-pack size numbers ending with a "3" are SmartChemicals with an RFID tag on the label for seamless data transfer to the instrument, e.g. xxxxxx1003 or xxxxxxx 4003. More information on www.sigmaaldrich.com/SmartChemicals

Legal Information

CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany

related product

Product No.
Description
Pricing

signalword

Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Acute Tox. 3 Oral - Acute Tox. 4 Dermal - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B - Eye Dam. 1 - Muta. 1B - Ox. Sol. 2 - Repr. 1B - Resp. Sens. 1 - Skin Corr. 1B - STOT RE 1 Inhalation - STOT SE 3

target_organs

Cardio-vascular system, Respiratory system

Storage Class

5.1B - Oxidizing hazardous materials

wgk_germany

WGK 3

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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Articles

The titer determination or standardization of a titration solution is essential for accurate and reliable titration results.

SmartChemicals enable wireless CoA data transfer, reducing human error in titration experiments.

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

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