Tetrahydroxozinc chromate

Structural formula
General
Surname	Tetrahydroxozinc chromate
other names	Pentazine chromate octahydroxide; Pentazine chromate octahydroxide; Alkali-free zinc yellow; Zinc tetraoxide chromate; Tetrahydroxy zinc chromate;
Molecular formula	Zn 5 (OH) 8 CrO 4
Brief description	yellow, odorless powder
External identifiers / databases
EC number	256-418-0
ECHA InfoCard	100.051.272
PubChem	44144623
Wikidata	Q15632782
properties
Molar mass	578.9 g mol −1
Physical state	firmly
solubility	practically insoluble in water
safety instructions
H and P phrases	H: 350-302-317-410
	P: ?
Authorization procedure under REACH	of particular concern : carcinogenic ( CMR ); subject to approval
MAK	Switzerland: 5 μg m −3 (calculated as chromium)
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Tetrahydroxozinc chromate , also known as pentazine chromate octahydroxide or alkali-free zinc yellow , with the empirical formula Zn ₅ (OH) ₈ CrO ₄ is a yellow pigment . Sometimes it is just referred to as zinc yellow , which is actually a potassium- containing chromate .

safety

Tetrahydroxozinc chromate is considered carcinogenic and is therefore no longer used in Europe.

Individual evidence

↑ ^a ^b ^c ^d ^e Entry on tetrahydroxozinc chromate in the GESTIS substance database of the IFA , accessed on September 29, 2013(JavaScript required) .
↑ Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry zinc chromates, including zinc potassium chromate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on June 11, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .
↑ Entry in the SVHC list of the European Chemicals Agency , accessed on July 17, 2014.
↑ Entry in the register of substances subject to authorization of the European Chemicals Agency , accessed on July 17, 2014.
↑ Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for chromium (VI) compounds ), accessed on October 27, 2015.
↑ Kim Pilkjær Simonsen, Marie Bitsch Christiansen, Morten Gotthold Vinum, Jana Sanyova, Jesper Bendix: Single crystal X-ray structure of the artists' pigment zinc yellow. In: Journal of Molecular Structure. 1141, 2017, p. 322, doi : 10.1016 / j.molstruc . 2017.03.108 .

[GESTIS-1] Entry on tetrahydroxozinc chromate in the GESTIS substance database of the IFA , accessed on September 29, 2013(JavaScript required) .

[CLP_100.240.767-2] Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry zinc chromates, including zinc potassium chromate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on June 11, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .

[SVHC-3] Entry in the SVHC list of the European Chemicals Agency , accessed on July 17, 2014.

[Zulassungspflicht-4] Entry in the register of substances subject to authorization of the European Chemicals Agency , accessed on July 17, 2014.

[5] Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for chromium (VI) compounds ), accessed on October 27, 2015.

[Simonsen2017-6] Kim Pilkjær Simonsen, Marie Bitsch Christiansen, Morten Gotthold Vinum, Jana Sanyova, Jesper Bendix: Single crystal X-ray structure of the artists' pigment zinc yellow. In: Journal of Molecular Structure. 1141, 2017, p. 322, doi : 10.1016 / j.molstruc . 2017.03.108 .