nyuuzyou/wikis huggingface dataset:
Chrome leather

== Description ==
Any leather tanned with chromium salts. Chrome leather is one of the major types of leather. It can be made quickly and has excellent wear, water, and heat resistance. Basic chromium sulfate is used to penetrate the skin quickly and firmly bond the proteins. Chrome tanning is also called mineral tanning.
== Synonyms and Related Terms ==
chrome-tanned leather; mineral tanned leather; chrome tannage; piel curtida al cromo (Esp.); pele curtida a(o) crómio (Port.); verchroomd leer (Ned); cuir tanné au chrome (Fr.); pele curtida ao cromio (Port.); verchroomd leer (Ned);
== Physical and Chemical Properties ==
Has a greenish color at the cut edge
== Resources and Citations ==
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
* Howard L. Needles, Handbook of Textile Fibers, Dyes & Finishes, Garland Publishing Co., New York, 1981
* American Leather Chemists Association Glossary at www.leatherchemists.org
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
Chrome liquor

== Description ==
A solution of a chromic acid salt used in chrome tanning. Chrome liquor usually contains sodium dichromate.
== Synonyms and Related Terms ==
chrometan
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
Category:Materials database
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
[[[SliderGallery rightalign|Chrome orange (Forbes MFA 205) resize.tif~Raman (MFA)|PIG205.jpg~XRD|f205sem.jpg~SEM|f205edsbw.jpg~EDS|Slide17 FC205.PNG~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
Category:Materials database
Chrome oxide, opaque

== Description ==
A rarely used name for a green pigment composed of chromic oxide.
[[[SliderGallery rightalign|Slide26 FC402.PNG~XRF]]]
== Synonyms and Related Terms ==
chromic oxide; Pigment Green 17; CI 77288; óxido de cromo opaco (Esp.); oxyde chrome opaque (Fr.); ossido di cromo opaco (It.); óxido de crómio, opaco (Port.)
== Risks ==
Toxic
==Resources and Citations==
* Reed Kay, The Painter's Guide To Studio Methods and Materials, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1983
Category:Materials database
Chrome oxide, transparent

== Description ==
A rarely used name for a green pigment composed of hydrous chrome oxide. 
See viridian, and chromium oxide hydrate.
== Synonyms and Related Terms ==
viridian; chromium oxide hydrate Pigment Green 18; CI 77289; óxdo de cromo trasparente (Esp.); verde viridiana (Esp.); oxyde de chrome transparent (Fr.); ossido di cromo trasparente (It.); óxido de crómio, transparente (Port.); Guignet's green; vert emeraude; transparent oxide of chrome
== Risks ==
Toxic
==Resources and Citations==
* Reed Kay, The Painter's Guide To Studio Methods and Materials, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1983
Category:Materials database
Chrome plate

== Description ==
A thin, shiny metallic surface layer of chromium electrodeposited on other metals, typically nickel. Chrome plating was first developed in 1856 by Geuther by dipping a metal in a chromic acid bath. By 1924, the method was perfected and widely used to create a mirror-like finish. Chrome plating usually has a thickness of 2 - 5 micrometers. It provides a shiny surface that is resistant to corrosion, wear and heat. Small air bubbles between the chrome plating and the base metal can result in tiny black corrosion pits. Chrome plating is used on automobile bumpers, plumbing fixtures, household appliances and sporting goods.
== Synonyms and Related Terms ==
chromium plating; chromage (Fr.), Verchromung (Deut.); plata cromada (Esp.); cromagem (Port.)
== Resources and Citations ==
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
* Tom Rowland, Noel Riley, A-Z Guide to Cleaning, Conserving and Repairing Antiques, Constable and Co., Ltd., London, 1981
Category:Materials database
Chromic acetate

== Description ==
Grayish-green water-soluble powder. Chromic acetate is used for tanning leathers, for hardening photographic emulsions, and as a mordant in dyeing and printing textiles.
== Synonyms and Related Terms ==
chromium acetate
== Risks ==
* Toxic by ingestion.
==Physical and Chemical Properties==
Soluble in water. Insoluble in ethanol.
Composition 	Cr(C2H3O2)3-H2O
CAS 	1066-30-4
Molecular Weight	mol. wt. = 229.13
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 2275
Category:Materials database
Chromic acid

== Description ==
Dark red deliquescent crystals of chromium trioxide. Chromic acid is made by mixing potassium dichromate and an acid such as hydrochloric acid or sulfuric acid. It is an extremely strong oxidizing agent that will react violently with any organic compound. For many years, chromic acid was used in chemical laboratories cleaning baths to remove all traces of organic residues from glassware (see Beckmann mixture). Chromic acid is also used for chrome plating baths, engraving etching, tanning and as a colorant in glass and ceramics. This corrosive compound was also used to dye wood, bone, and ivory black.
[[[SliderGallery rightalign|chromic acid.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
chromium (IV) oxide; chromic trioxide; chromium trioxide; chromic anhydride;
== Risks ==
* Powerful oxidizing agent, may explode on contact with reducing agents. 
* Toxic by ingestion. 
* Contact will corrode skin and membranes.
* LabChem: SDS
==Physical and Chemical Properties==
Soluble in water, ethanol, mineral acids.
Composition 	CrO3 (in water-H2CrO4)
CAS 	1333-82-0
Melting Point 	197 C
Density 	2.7 g/ml
Molecular Weight	mol. wt. = 100.01
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p.192
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
* Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 2293
* Jonathan Thornton, JAIC 43. p 274, Submitted information.
* Conservation termlist at www.hants.org.uk/museums
Category:Materials database
Chromic chloride

== Description ==
Shiny, violet, platelike crystals. Chromic chloride reacts slowly with water to form a hexahydrate form that is a dark green, water soluble salt. Chromium chloride is used for tanning leathers and for mordanting dyes on textiles. It is also used for vapor plating chromium and as a corrosion inhibitor.
[[[SliderGallery rightalign|chromic chloride.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
chromium (III) chloride; chromium trichloride; chromium sesquichloride
== Risks ==
* Toxic. 
* ThermoFisher: SDS
==Physical and Chemical Properties==
Insoluble in water, ethanol
Composition 	CrCl3
CAS 	10025-73-7
Melting Point 	1152 C
Density 	2.87 g/ml
Molecular Weight	mol. wt. = 158.35
Boiling Point 	1300 C (dec)
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry # 2278
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 797
Category:Materials database
Chromic fluoride

== Description ==
Dark, green needle-like crystals. Chromic fluoride is used for printing, dyeing and mothproofing woolen fabrics. It was also used for hardening marble and polishing metals.
== Synonyms and Related Terms ==
chromium (III) fluoride; chromium trifluoride
== Risks ==
* Toxic. 
* Contact with skin and eyes will cause burns.
* ThermoFisher: SDS
==Physical and Chemical Properties==
Insoluble in water, ethanol
Composition 	CrF3
CAS 	7788-97-8
Melting Point 	1000 C
Density 	3.8 g/ml
Molecular Weight	mol. wt. = 108.99
==Resources and Citations==
* Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: Entry 2279
Category:Materials database
Chromic phosphate

== Description ==
Chromic phosphate exists in two hydrated forms. The hexahydrate form of chromic phosphate is a violet powder. The hemiheptahydrate form is a bluish green powder that has been used as a paint pigment called Arnaudon's green and Plessy's green.
== Synonyms and Related Terms ==
chromium phosphate; Arnaudon's green; Arnaudon's chrome green; Plessy's green; Mathieu-Plessy's green; vert Arnaudon;
== Risks ==
* American Elements: SDS
==Physical and Chemical Properties==
Both forms are insoluble in water and acids.
Composition 	CrPO4
CAS 	7789-04-0
Density 	2.12 g/ml
Molecular Weight	mol. wt. = 146.97
==Resources and Citations==
* R. Newman, "Chromium Oxide Greens", Artists Pigments, Volume 3, E. West FitzHugh (ed.), Oxford University Press: Oxford, 1997.
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 611
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 2284
Category:Materials database
Chromic sulfate

== Description ==
Chromic sulfate exists in several hydrated states. Anhydrous chromic sulfate is a violet red powder that is insoluble in water. Hydrated chromic sulfates are water soluble green powders. Chromic sulfate is used for metal plating solutions, tanning leathers, for hardening photographic emulsions, and as a mordant in dyeing and printing textiles. It is also used in green paints, varnishes, inks, and ceramic glazes.
== Synonyms and Related Terms ==
chromium sulfate; chromic sulphate (Br.)
== Risks ==
* Contact causes irritation. 
* Ingestion may be fatal due to renal failure. 
* Fisher Scientific: MSDS
==Physical and Chemical Properties==
Composition 	Cr2(SO4)3
CAS 	10101-53-8
Melting Point 	90 C
Density 	1.7 g/ml
Molecular Weight	mol. wt. = 392.18
Refractive Index	1.564
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 797
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 2287
* CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index=1.564
Category:Materials database
Chromite

== Description ==
A naturally occurring ore of chromium. Chromite is composed of oxides of iron and chromium and may contain magnesium and aluminum. Chromite is a black to dark brown color stone with a metallic luster. It looks like magnetite but has poor magnetic properties. Chromite is found in South Africa, Rhodesia, Cuba, Turkey, the Philippines, India, Japan, Greece, Albania, Russia, Finland, Zimbabwe, western Europe, New Caledonia, Brazil, and the United States (Maryland, Texas, Pennsylvania, California, Oregon, Wyoming, North Carolina).
== Synonyms and Related Terms ==
iron chromite; chrome iron ore; ferrous chromite; Chromeisenstein (Deut.); Chromit (Deut.); chromiet (Ned.); chromita (Port.)
[[[SliderGallery rightalign|chromiteRS.jpg~Raman]]]
==Physical and Chemical Properties==
* Isometric crystal system with octahedral crystals; often granular or compact. 
* No distinct cleavage. 
* Fracture = conchoidal; brittle. 
* Luster = submetallic to metallic. 
* Streak = dark brown. 
* Slightly magnetic.
Composition 	FeCr2O4
CAS 	1308-21-2
Mohs Hardness	5.5
Density 	3.6 gml
==Resources and Citations==
* Mineralogy Database: Chromite
* Encyclopedia Britannica, http://www.britannica.com Comment: "chromite" [Accessed December 11, 2001
* C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 193
* 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
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* Wikipedia: http://en.wikipedia.org/wiki/Chromite (Accessed Sept. 2, 2005 for foreign language terms); specific gravity = 4.5-4.8
Category:Materials database
Chromium

== Description ==
Hard, brittle metallic element that takes a high polish. Chromium was discovered as an element in 1797 by Louis-Nicholas Vauquelin of France. It has an abundance of 122 parts per million in the earth's crust. It is primarily found as the ore chromite. Chromium is added to steel alloys to increase hardness and corrosion resistance (see stainless steel). It is also used for plating other metals since it readily forms a thin oxide surface layer that resists corrosion (see chrome plate). Chromium salts are used as pigments in paint and glass, as mordants for dyeing textiles, for tanning leather and as wood preservatives. Some chromium salts, such as chromium acetate, exhibit an alexandrite effect where they appear red in concentrated solutions and green in dilute solutions.
Chromium is on the ILFI Red list of building materials.
== Synonyms and Related Terms ==
Cr; Chroom (Ned.); chrome (Fr.); Chrom (Deut.); cromo (It., Esp.); crómio (Port.); Krom (Sven.) 
==Risks ==
* Toxic by inhalation of dust. Can cause breathing problems and lung cancer. 
* Skin contact may cause irritation and skin ulcers. 
* Chromium salts are toxic by ingestion. Can cause stomach tumors
* Carcinogenic. 
* ThermoFisher: SDS
== Physical and Chemical Properties ==
* Soluble in alkalis and acids except for nitric. Insoluble in water. 
* Body-centered cubic structure. 
* Diphenylcarbazide solution is used for the colorimetric detection of chromium in metals, tanned leathers and pigments (Odegaard et al 2000)
Composition 	Cr (atomic no. 24)
CAS 	7440-47-3
Mohs Hardness 	9.0
Melting Point 	1903 C
Density 	7.14 g/ml
Molecular Weight	atomic wt = 51.996
Boiling Point 	2642 C
== Resources and Citations ==
* N.Odegaard, S.Carroll, W.Zimmt, Material Characterization Tests for Objects of Art and Archaeology Archetype Publications, London, 2000, p.44. 
* Web Elements: Website
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 2288
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 193
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
* Tom Rowland, Noel Riley, A-Z Guide to Cleaning, Conserving and Repairing Antiques, Constable and Co., Ltd., London, 1981
* Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
Category:Materials database
Chromium antimony titanate

== Description ==
A rich yellow ceramic colorant developed in the early 20th century. Chromium antimony titanate is a solid solution of chromium antimonate and titanium dioxide. Analysis shows the approximate proportions are 2-5% chromic oxide, 10-20 % antimony pentoxide, with the remainder titanium dioxide. The additions of electropositive elements will both intensify and darken the yellow color.
==Physical and Chemical Properties==
Inert, stable to 1300 C.
==Resources and Citations==
* C. J. Harbeck, 'Ceramic Pigments' Industrial and Engineering Chemistry, 30(7), 1938.
Category:Materials database
Chromium dioxide

== Description ==
A black powder. Chromium dioxide is a semiconductor and has strong magnetic properties. It is used as the active material in recording tapes and magnetic strips on credit cards.
== Risks ==
Can decompose in air to form chromic oxide (Cr2O3)
==Physical and Chemical Properties==
Composition 	CrO2
Density 	4.9 g/ml
Molecular Weight	mol. wt. = 83.99
Category:Materials database
Chromium oxide hydrate

== Description ==
A transparent, green gelatinous mass. Chromium oxide hydrate, commonly called viridian, is used as a pigment, a tanning agent and as a mordant for textile dyeing.
== Synonyms and Related Terms ==
viridian; transparent chrome oxide; Pigment Green 18; CI 77289; hidróxido de cromo (Esp.); hydroxyde de chrome (Fr.); idrossido di cromo (It.); hidróxido de crómio (Port.); chromic hydrate; chromic hydroxide; chromium hydroxide; chromium hydrate; Guignet's green; chromic oxide gel; hydrous chromic oxide
[[[SliderGallery rightalign|Viridian, chromium oxide green (bottle 405).TIF~FTIR (MFA)|ViridianUCL.jpg~Raman|viridian632.jpg~Raman|f412sem.jpg~SEM|f412edsbw.jpg~EDS]]]
==Risks ==
* Toxic by ingestion, inhalation and skin contact. 
* Suspected carcinogen.
==Physical and Chemical Properties==
* Soluble in acid and alkali. Insoluble in water. 
* Decomposes to chromic oxide with heat.
Composition 	Cr(OH)3
Molecular Weight	mol. wt. = 103.02
==Resources and Citations==
* Reed Kay, The Painter's Guide To Studio Methods and Materials, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1983
* 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
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 2281
Category:Materials database
Chromium potassium sulfate

== Description ==
Dark, violet crystals used as a hardener in photographic processing solutions. Chromium potassium sulfate is also used in chrome tanning baths for leather and as a mordant for textile dyeing.
== Synonyms and Related Terms ==
potassium chrome alum; chrome alum; potassium chromium sulfate; chrome potash alum
== Risks ==
* Toxic by inhalation and ingestion. 
* Contact may cause irritation.
* ThermoFisher: SDS
==Physical and Chemical Properties==
Soluble in water
Composition 	CrK(SO4)2.12H2O
CAS 	10141-00-1
Melting Point	89 C
Density 	1.813 g/ml
== Sources Checked for Data in Record ==
* 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
Category:Materials database
Chromium trioxide

== Description ==
Dark, violet-red deliquescent crystals. Chromium trioxide is normally used as an aqueous solution which is commonly called chromic acid. Chromic acid is made by mixing potassium dichromate and an acid such as hydrochloric acid or sulfuric acid. It is an extremely strong oxidizing agent that will react violently with any organic compound. For many years, chromic acid was used in chemical laboratories cleaning baths to remove all traces of organic residues from glassware (see Beckmann mixture). Chromic acid is also used for chrome plating baths, engraving etching, tanning, and as a colorant in glass and ceramics.
[[[SliderGallery rightalign|chromium trioxide.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
chromic acid; chromic anhydride; chromium (VI) oxide; anhydride chromique (Fr.); anidride cromica (It.); Chromsaeureanhydrid (Deut.); Chromtrioxid (Deut.); chroomtrioxyde (Ned.);
== Risks ==
* Powerful oxidizing agent, may explode on contact with reducing agents. 
* Toxic by ingestion. 
* Contact will corrode skin and membranes. 
* Carcinogenic. 
* Hygroscopic. 
* Corrodes steel, copper and alloys. 
* Decomposition produces toxic fumes. 
* ThermoFisher: SDS
==Physical and Chemical Properties==
 
Soluble in water, ethanol, mineral acids.
Composition 	CrO3
CAS 	1333-82-0
Melting Point 	197 C
Density 	2.70 g/ml
Molecular Weight	mol. wt. = 100.01
Boiling Point 	250 C (dec)
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 192
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: Entry 2283
* Conservation termlist: www.hants.org.uk/museums 
* Wikipedia: http://en.wikipedia.org/wiki/Chromium_trioxide (Accessed Jan. 15, 2006)
* Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
* Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
Category:Materials database