Difference between revisions of "Chrome orange"

Latest revision as of 14:22, 29 May 2022

Chrome orange

Description

A basic lead chromate pigment that ranges in shades from orange to red. First made in 1809 by Vauquelin, basic lead chromate is formed by heating lead chromate and sodium hydroxide solution. The color of chrome red, or chrome orange can vary from a brown-yellow to a brick-red color depending on particle size and to the ratio of lead oxide to lead chromate. It is stable in light but is not widely used because of its sensitivity to sulfur gases. Most often, chrome red is used as an anticorrosive base coats for steel. See also Chrome yellow.

Synonyms and Related Terms

basic lead (II) chromate; Pigment Orange 21 and 45; CI 77601; phoenicochroite (mineral); anaranjado de cromo (Esp.); Chromorange (Deut.); chromorange (Fr.); portokali toy chromioy (Gr.); arancio cromo (It.); chroomoranje (Ned.); laranja de crómio (Port.); orange paste; American vermilion; plumbous chromate

Raman (MFA)

XRD

SEM

EDS

XRF

Risks

Toxic by inhalation or ingestion.
Skin contact may cause irritation or ulcers.
Carcinogen, teratogen, suspected mutagen.
Discolored by heat and sulfur fumes
Cornelissen: SDS

Physical and Chemical Properties

Soluble in strong acids and alkalis. Insoluble in water.
Can change to yellow in acetic acid.

Composition	PbO-CrO3
CAS	7758-97-6
Mohs Hardness	2.5
Melting Point	844 C
Density	6.3-6.7 g/ml
Molecular Weight	mol. wt. = 323.2
Refractive Index	2.42; 2.7; 2.7

Resources and Citations

H. Kuhn, M.Curran, "Chrome Yellow and Other Chromate Pigments", Artists Pigments, Volume 1, R. Feller (ed.), Cambridge University Press: Cambridge, 1986.

R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966

Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993

Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979

Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976

The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 5423

Web Exhibits: http://webexhibits.org/pigments/indiv/overview/crorange.html

@@ Line 2: / Line 2: @@
 == Description ==
-A basic lead chromate pigment that ranges in shades from orange to red. First made in 1809 by Vauquelin, basic lead chromate is formed by heating lead chromate and sodium hydroxide solution. The color of chrome red, or chrome orange can vary from a brown-yellow to a brick-red color depending on particle size and to the ratio of lead oxide to lead chromate. It is stable in light but is not widely used because of its sensitivity to sulfur gases. Most often, chrome red is used as an anticorrosive base coats for steel. See also [http://cameo.mfa.org/materials/fullrecord.asp?name=chrome%20yellow chrome yellow].
+A basic lead chromate pigment that ranges in shades from orange to red. First made in 1809 by Vauquelin, basic lead chromate is formed by heating lead chromate and sodium hydroxide solution. The color of chrome red, or chrome orange can vary from a brown-yellow to a brick-red color depending on particle size and to the ratio of lead oxide to lead chromate. It is stable in light but is not widely used because of its sensitivity to sulfur gases. Most often, chrome red is used as an anticorrosive base coats for steel. See also [[chrome yellow]].
 == Synonyms and Related Terms ==
@@ Line 8: / Line 8: @@
 basic lead (II) chromate; Pigment Orange 21 and 45; CI 77601; phoenicochroite (mineral); anaranjado de cromo (Esp.); Chromorange (Deut.); chromorange (Fr.); portokali toy chromioy (Gr.); arancio cromo (It.); chroomoranje (Ned.); laranja de crómio (Port.); orange paste; American vermilion; plumbous chromate
-[[[SliderGallery rightalign|PIG205.jpg~XRD|f205sem.jpg~SEM|f205edsbw.jpg~EDS|Slide17 FC205.PNG~XRF]]]
+[[[SliderGallery rightalign|Chrome orange (Forbes MFA 205) resize.tif~Raman (MFA)|PIG205.jpg~XRD|f205sem.jpg~SEM|f205edsbw.jpg~EDS|Slide17 FC205.PNG~XRF]]]
-== Other Properties ==
+== Risks ==
-Soluble in strong acids and alkalis. Insoluble in water. Can change to yellow in acetic acid.
+* Toxic by inhalation or ingestion.
+* Skin contact may cause irritation or ulcers.
+* Carcinogen, teratogen, suspected mutagen.
+* Discolored by heat and sulfur fumes
+* Cornelissen: [https://www.cornelissen.com/media/catalog/customfield/MSDS_PGR_Chrome_Yellow_Orange.pdf SDS]
+==Physical and Chemical Properties==
+* Soluble in strong acids and alkalis. Insoluble in water.
+* Can change to yellow in acetic acid.
 {| class="wikitable"
@@ Line 26: / Line 35: @@
 |-
 ! scope="row"| Melting Point
-| 844
+| 844 C
 |-
 ! scope="row"| Density
-| 6.3-6.7
+| 6.3-6.7 g/ml
 |-
 ! scope="row"| Molecular Weight
@@ Line 38: / Line 47: @@
 |}
-== Hazards and Safety ==
+==Resources and Citations==
-Toxic by inhalation or ingestion.  Skin contact may cause irritation or ulcers.
-Carcinogen, teratogen, suspected mutagen.
-Discolored by heat and sulfur fumes
-LINK: [http://www.cdc.gov/niosh/ipcsneng/neng0003.html International Chemical Safety Card]
-== Additional Information ==
-H. Kuhn, M.Curran, "Chrome Yellow and Other Chromate Pigments", ''Artists Pigments'', Volume 1, R. Feller (ed.), Cambridge University Press: Cambridge, 1986.
-== Authority ==
+* H. Kuhn, M.Curran, "Chrome Yellow and Other Chromate Pigments", ''Artists Pigments'', Volume 1, R. Feller (ed.), Cambridge University Press: Cambridge, 1986.
 * R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966
@@ Line 64: / Line 61: @@
 * ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983  Comment: entry 5423
-* Website address 1  Comment: http://webexhibits.org/pigments/indiv/overview/crorange.html
+* Web Exhibits: http://webexhibits.org/pigments/indiv/overview/crorange.html
 [[Category:Materials database]]