Sodium chromate

Structural formula
General
Surname	Sodium chromate
other names	Chromium sodium; Sodium monochromate; Disodium chromate; Chromic acid sodium salt; chromic acid sodium;
Molecular formula	Na 2 CrO 4
Brief description	odorless, translucent yellow crystals
External identifiers / databases
EC number	231-889-5
ECHA InfoCard	100,028,990
PubChem	24488
ChemSpider	22896
Wikidata	Q407958
properties
Molar mass	161.97 g mol −1
Physical state	firmly
density	2.73 g cm −3 (18 ° C)
Melting point	792 ° C
boiling point	thermal decomposition
solubility	good in water (530 g l −1 at 20 ° C)
safety instructions
H and P phrases	H: 301-312-330-314-317-334-340-350-360FD-372-410
	P: 201-280-301 + 330 + 331 + 310-304 + 340 + 310-305 + 351 + 338-308 + 313-305 + 351 + 338
Authorization procedure under REACH	of particular concern : carcinogenic, mutagenic, toxic for reproduction ( CMR ); subject to approval
MAK	Switzerland: 5 μg m −3 (calculated as chromium)
Toxicological data	136 mg kg −1 ( LD 50 , rat , oral )
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Sodium chromate is a chemical compound of the elements sodium , chromium and oxygen or the sodium salt of chromic acid .

Extraction and manufacture

It arises as an intermediate product in the extraction of chromium from the mineral chromite .

properties

Sodium chromate

Sodium chromate has a strong oxidizing effect.

use

The sodium salt of chromic acid is used in the laboratory as a strong oxidizing agent , as a marking substance in biological research, as an anti-corrosion agent in refrigerators and as a wood preservative .

safety instructions

Like all chromates , sodium chromate is carcinogenic, teratogenic and can lead to allergies . The substance is toxic if swallowed and very toxic if inhaled.

Individual evidence

↑ ^a ^b Sodium chromate data sheet at AlfaAesar, accessed on February 3, 2010 ( PDF )(JavaScript required) .

↑ ^a ^b ^c ^d ^e ^f Entry on sodium chromate in the GESTIS substance database of the IFA , accessed on January 8, 2018(JavaScript required) .

↑ Entry on sodium chromate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .

↑ Entry in the SVHC list of the European Chemicals Agency , accessed on July 14, 2014.

↑ Entry in the register of substances subject to authorization of the European Chemicals Agency , accessed on July 14, 2014.

↑ Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for chromium (VI) compounds ), accessed on October 7, 2019.

↑ Entry on chrome at seilnacht.com, accessed on January 27, 2018.

^ I. Lauermann, H. Hecker, E. Kirchner: Creation of blood volume reference values for erythrocyte-marking indicator dilution methods on the basis of literature data. In: Transfusion Medicine and Hemotherapy. 26, 1999, p. 360, doi : 10.1159 / 000053520 .

↑ PAN Pesticides Database - California Pesticide Use: Sodium chromate - Pesticide use statistics for 2005 ( Memento of September 28, 2007 in the Internet Archive ), accessed on January 27, 2018.

[alfa-1] Sodium chromate data sheet at AlfaAesar, accessed on February 3, 2010 ( PDF )(JavaScript required) .

[GESTIS-2] ↑ ^a ^b ^c ^d ^e ^f Entry on sodium chromate in the GESTIS substance database of the IFA , accessed on January 8, 2018(JavaScript required) .

[CLP_100.028.990-3] Entry on sodium chromate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .

[SVHC-4] Entry in the SVHC list of the European Chemicals Agency , accessed on July 14, 2014.

[Zulassungspflicht-5] Entry in the register of substances subject to authorization of the European Chemicals Agency , accessed on July 14, 2014.

[6] Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for chromium (VI) compounds ), accessed on October 7, 2019.

[7] Entry on chrome at seilnacht.com, accessed on January 27, 2018.

[8] I. Lauermann, H. Hecker, E. Kirchner: Creation of blood volume reference values for erythrocyte-marking indicator dilution methods on the basis of literature data. In: Transfusion Medicine and Hemotherapy. 26, 1999, p. 360, doi : 10.1159 / 000053520 .

[9] PAN Pesticides Database - California Pesticide Use: Sodium chromate - Pesticide use statistics for 2005 ( Memento of September 28, 2007 in the Internet Archive ), accessed on January 27, 2018.