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Metals, alloys and elements

Chromium

Also known as Chrome, Chromium metal, Chrom

CAS 7440-47-3Formula CrMolar mass 52.00 g/molEC 231-157-5
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard 81 suppliers listed Drug substance
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Element with atomic number and standard atomic weight

Key facts

What buyers check first

All properties
Appearance
Steel-gray, lustrous metal, body-centered cubic structure
Melting point
1,907 °C
Boiling point
2,642 °C
Density
7.15 g/cm³
Solubility
Insoluble in water
HS code
811221
Category
Metals, alloys and elements
UN number
UN 1759
Illustrative photo, metallic grey powder in a glass bottle on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Chromium?

Plain description, key identifiers and synonyms

Chromium atom is a chromium group element atom that has atomic number 24. It has a role as a micronutrient. It is a chromium group element atom and a metal allergen.

Chromium is a chemical element with symbol Cr and atomic number 24.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
chromium
CAS number
7440-47-3 CAS number cross-checkedOther or deprecated CAS: 16065-83-1, 19498-56-7
EC number
231-157-5
Molecular formula
Cr
UNII
0R0008Q3JB
MDL number
MFCD00010944
INCI name
CHROMIUM
InChIKey
VYZAMTAEIAYCRO-UHFFFAOYSA-N
InChI
InChI=1S/Cr
SMILES (canonical and isomeric)
[Cr]

Synonyms

  • Chrome
  • Chromium metal
  • Chrom
  • Chromium, elemental
  • Dinakrome
  • BioChrome
  • Dietary Chromium
  • Chromium Metallicum
  • lambda6-chromium(6+) ion
  • Cr
  • chromium atom
  • chromide(1-)
  • Chromium ion
  • Chromium powder, APS <10 micron
  • cromo
  • Chromium Hollow Cathode Lamp: 1.5" Diameter, 2-pin, Non-Coded
  • Chromium Hollow Cathode Lamp: 2.0" Diameter, 4-pin, Cableless
  • Chromium Hollow Cathode Lamp: 2.0" Diameter, 9-pin, Non-Coded
  • Chromium, metal
  • Metallic chromium
  • Sulfur-Free Chromium Concentrate: Cr @ approx. 3.5 wt% in Hydrocarbons
  • Chromium element
  • Chromium Standard: Cr @ 10 microg/mL in 2% HNO3
  • Chromium Standard: Cr @ 1000 microg/mL in 5% HCl
  • Chromium Standard: Cr @ 10000 microg/mL in 5% HCl
Show all 36 synonyms
  • Chromium AA Standard: Cr @ 1000 microg/mL in 5% HCl
  • Chromium Standard: Cr @ 1000 microg/mL in 5% HNO3
  • Chromium Standard: Cr @ 10000 microg/mL in 5% HNO3
  • Chromium Standard: Cr @ 1000 microg/g in Hydrocarbon Oil
  • Chromium Standard: Cr @ 5000 microg/g in Hydrocarbon Oil
  • chromic element
  • chromium anion
  • Chromium flakes
  • Chromium powder
  • Chromium chips
  • Atomic Chromium

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Steel-gray, lustrous metal, body-centered cubic structureexp.
Odour
Odorlessexp.
Melting point
1,907 °Cexp.
Boiling point
2,642 °Cexp.
Density
7.15 g/cm³exp.
Solubility
Insoluble in waterexp.
Vapour pressure
1 Pa at 1383 °C (sublimes)exp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
52.00 g/molcalc.
Exact mass
51.9405 Dacalc.
LogP (octanol/water)
0calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
1calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H317May cause an allergic skin reaction.
  • H319Causes serious eye irritation.
  • H334May cause allergy or asthma symptoms or breathing difficulties if inhaled.
Precautionary statements (18)
  • P233Keep container tightly closed.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P284In case of inadequate ventilation wear respiratory protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P342 + P316If experiencing respiratory symptoms: Get emergency medical help immediately.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403Store in a well-ventilated place.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 1759

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Chromium suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 81 suppliers
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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

81 suppliers in 12 countries

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Chromium price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

In maufacturing of chrome-steel or chrome-nickel-steel alloys (stainless steel), nonferrous alloys, heat resistant bricks for refractory furnaces. To greatly increase strength, hardness and resistance of metals to abrasion, corrosion and oxidation. For chrome plating of other metals, leather tanning, as pigment and mordant, wood preservative.

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Use of (51)Cr as diagnostic aid.

Alloying and plating element on metal and plastic substrates for corrosion resistance, chromium-containing and stainless steels, protective coating for automotive and equipment accessories, nuclear and high temperature research, constituent of inorganic pigments.

Cobalt-chromium stellite alloys (extrusion dies/turbine blades/valve seats), cobalt-chromium tungsten alloys (cemented carbide cutting tools), nickel chromium alloys (jet engine parts, electrical heating elements).

Forms heat-treatable copper alloys.

The metal chromium is used mainly for making steel and other alloys.

Industrial uses: Intermediate, Filler, Chemical reaction regulator, Other, Alloys, Anti-adhesive/cohesive.

Consumer uses: Chemical reaction regulator, Alloys, Other, Pigment, Filler, Other (specify).

Use classes: Inorganic substances.

Cosmetic ingredient, INCI name CHROMIUM(colorant)

Pharmacological actions

  • Trace Elements

Roles

  • food component
  • micronutrient
  • nutrient
  • physiological role

Functional uses

  • Alloying element
  • Antioxidant
  • Dye
  • Pigment

Cosmetic functions

  • Colorant

Pharmacology

Chromium is a Standardized Chemical Allergen. The physiologic effect of chromium is by means of Increased Histamine Release and Cell-mediated Immunity.

How it is made

Chromium metal is commercially produced in the United States by the reduction of chromite ore with carbon, aluminum, or silicon, and subsequent purification.

Chromium is extracted from its ores by alkaline or acidic dissolution. In alkali dissolution, finely ground chrome ore is roasted with Na2CO3 under oxidizing conditions at ca. 1100 °C. The sodium chromate is leached from the calcine, most of the gangue is insoluble. The solution containing hexavalent Cr can be reduced with SO2 and used for electrowinning, or Na2Cr2O7 can be crystallized from it.

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The Na2Cr2O7 can be converted to CrO3 for use in electrolysis or to Cr2O3 for use in metallothermics. Chrome ore can be dissolved in acid if an oxidizing agent is present. However, Fe, Al, and Mg also dissolve and must be removed. The preferred acidic dissolution technique is to reduce the ore with carbon, forming ferrochromium, which is ground and dissolved in sulfuric acid. The only significant impurity carried over is Fe, which is removed by crystallization as iron(II) ammonium sulfate. The Cr in the solution is in the +3 valence state and with additional purification is used to produce electrolytic Cr.

Chromium metal is produced by the reduction of Cr2O3 or the electrolysis of Cr(III) solutions. The metal can also be obtained from Cr(VI) solutions by electrolysis, but the process is less efficient and is used primarily for plating.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • EU Cosmetics Regulation Annex II, prohibited in cosmetics
    Name: Chromium, chromic acid and its salts, Ref no: 97, Annex ref: II/97
  • Active ingredient in FDA approved drug labels

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Chromium is traded under.

HS 8112.21Indicative HS code

Unwrought chromium, powders

Our trade statistics cover HS chapters 25 to 40 (minerals, chemicals, plastics and rubber). This code is in chapter 81, metals, which is not included yet.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Chromium is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Chromium, based on the data on this page

What is Chromium?

Chromium atom is a chromium group element atom that has atomic number 24. It has a role as a micronutrient. It is a chromium group element atom and a metal allergen.

What is the CAS number of Chromium?

The CAS registry number of Chromium is 7440-47-3. Other or deprecated CAS numbers: 16065-83-1, 19498-56-7.

What is the molecular formula and weight of Chromium?

The molecular formula of Chromium is Cr and its molar mass is 52.00 g/mol.

What is Chromium used for?

In maufacturing of chrome-steel or chrome-nickel-steel alloys (stainless steel), nonferrous alloys, heat resistant bricks for refractory furnaces. To greatly increase strength, hardness and resistance of metals to abrasion, corrosion and oxidation.

Is Chromium hazardous?

Chromium carries the GHS signal word "Danger". Main hazards: may cause an allergic skin reaction, causes serious eye irritation, may cause allergy or asthma symptoms or breathing difficulties if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Chromium?

Chromium is usually classified under HS code 811221 (Unwrought, powders). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Chromium?

CompoundList lists 81 suppliers of Chromium in United States, China, India, Germany and 8 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Chromium in India?

11 suppliers in India list Chromium on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Chromium?

Suppliers quote Chromium on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Chromium

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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