| Formula / Notation | Cr |
|---|---|
| CAS Number | 7440-47-3 |
| Molecular Weight | 52.0 |
| Melting Point | 1907.0 |
| Boiling Point | 2671.0 |
| Density | 7.15 |
| Solubility | Insoluble in water |
| Appearance | Hard, lustrous, steel-grey metal |
| Also Known As | Cr, chromium metal |
| Category | Elements |
What is Chromium?
Chromium is a hard, lustrous transition metal, atomic number 24. Famous for its corrosion resistance and bright finish in electroplating. Chromium(III) compounds are relatively safe but chromium(VI) compounds are highly toxic and carcinogenic. The most important steel alloy component (stainless steel).
Formula & Notation
IUPAC Name: Chromium
Other Names / Synonyms: Cr, chromium metal
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 1907.0 |
| Boiling Point | 2671.0 |
| Density | 7.15 |
| Molecular Weight | 52.0 |
| Solubility | Insoluble in water |
| Appearance | Hard, lustrous, steel-grey metal |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Chromium is a hard, lustrous transition metal, atomic number 24. Famous for its corrosion resistance and bright finish in electroplating. Chromium(III) compounds are relatively safe but chromium(VI) compounds are highly toxic and carcinogenic. The most important steel alloy component (stainless steel).
Stainless steel (Cr gives corrosion resistance). Chrome plating. Chromite refractory bricks. Cr2O3 pigment (green). Tanning of leather (Cr(III) salts). Catalysts. Ruby (Cr3+ in Al2O3). Chromate corrosion inhibitors.
Cr(VI) (hexavalent chromium): highly toxic carcinogen (IARC Group 1), causes lung cancer, dermal ulcers, eye damage. OSHA PEL: 0.005 mg/m3. Cr(III): much less toxic. Chrome plating baths: serious inhalation hazard. Strict regulatory controls for Cr(VI).
The formula or notation for Chromium is: Cr