Merck
CN
All Photos(1)

Documents

Safety Information

1.04952

Supelco

Potassium chromate

for analysis EMSURE® ACS,Reag. Ph Eur

Sign Into View Organizational & Contract Pricing

Select a Size

Change View
Synonym(s):
Potassium chromate, chromic acid potassium salt
Empirical Formula (Hill Notation):
CrK2O4
CAS Number:
Molecular Weight:
194.19
MDL number:
EC Index Number:
232-140-5

grade

ACS reagent

Quality Level

Agency

reag. Ph. Eur.

product line

EMSURE®

Assay

≥99.5% (iodometric)

form

solid

impurities

≤0.005% In water insoluble matter

pH

9.0-9.8 (20 °C, 50 g/L in H2O)

mp

985 °C

solubility

637 g/L

density

2.73 g/cm3 at 18 °C

bulk density

1400 kg/m3

anion traces

chloride (Cl-): ≤0.001%
sulfate (SO42-): ≤0.01%

cation traces

Ca: ≤0.005%
Na: ≤0.02%
Pb: ≤0.005%

storage temp.

2-30°C

InChI

1S/Cr.2K.4O/q;2*+1;;;2*-1

InChI key

XMXNVYPJWBTAHN-UHFFFAOYSA-N

Looking for similar products? Visit Product Comparison Guide

Related Categories

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

This Item
5295081.049121.01036
Potassium chromate for analysis EMSURE® ACS,Reag. Ph Eur

Supelco

1.04952

Potassium chromate

Potassium chromate ≥99.95% trace metals basis

Sigma-Aldrich

529508

Potassium chromate

Potassium bromate for analysis (max 0,000001% Hg) EMSURE® ACS,ISO,Reag. Ph Eur

Supelco

1.04912

Potassium bromate

assay

≥99.5% (iodometric)

assay

≥99.95% trace metals basis

assay

≥99.8% dry basis (iodometric)

assay

99.0-102.0% (iodometric)

form

solid

form

solid

form

crystalline powder

form

solid

impurities

≤0.005% In water insoluble matter

impurities

≤500.0 ppm Trace Metal Analysis

impurities

≤0.005% Insoluble matter

impurities

≤0.01% Insoluble matter

pH

9.0-9.8 (20 °C, 50 g/L in H2O)

pH

-

pH

5-9 (20 °C, 50 g/L in H2O)

pH

3 (20 °C, 50 g/L in H2O)

mp

985 °C

mp

971 °C (lit.)

mp

409-413 °C

mp

89 °C

Analysis Note

Assay (iodometric): ≥ 99.5 %
In water insoluble matter: ≤ 0.005 %
pH-value (5 %; water): 9.0 - 9.8
Chloride (Cl): ≤ 0.001 %
Sulfate (SO₄): ≤ 0.01 %
Ca (Calcium): ≤ 0.005 %
Na (Sodium): ≤ 0.02 %
Pb (Lead): ≤ 0.005 %

Legal Information

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

Signal Word

Danger

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B Inhalation - Eye Irrit. 2 - Muta. 1B - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

危险化学品

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’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

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

Contact Technical Service