Chromium（CAS 7440-47-3）：分子式 Cr、分子量 51.996；类别 无机化学品。
登记用途：Uses: The metal chromium is used mainly for making steel and other alloys.、MINING、SMELTING、OR METALLURGY: Ore mining and crushing operations、Alloy production、Produce chromates from chromite、MANUFACTURING: Textile dyes、Paint pigments、Chrome plating、Leather tanning、Printing inks and toners、Photoengraving、Automotive & aircraft parts、Joint prostheses、Refractory bricks & kilns、USING: Heat or machine chromium alloys、Arc weld stainless steel、Spray paint Cr pigments、Mix and lay cement or concrete、Use water system corrosion inhibitors、wood preservatives、or glassware-cleansing solutions、Use hexavalent chromates in hardeners for epoxy resin sealants、Chromium(VI) is present also as an impurity in Portland cement、and can be generated and given off during casting、welding、and cutting operations involving stainless steel、even if chromium was not originally present in its hexavalent state. [ACGIH] Stainless steels are a group of iron-based alloys containing at least 10.5% chromium. Chromium is used to make stainless steel corrosion resistant. . . . In ferrochromium operations、trivalent (insoluble) chromium (Cr3+) predominates、but hexavalent (soluble) chromium (Cr6+) also occurs at low levels、usually at below 1 ug m-3. [PMID 26950803]、Steel Producing [Category: Industry]、Abrasive Blasting [Category: Clean]、Metal Preparation and Pouring [Category: Foundry]、Metal Machining [Category: Heat or Machine]、Welding [Category: Weld]、Electroplating [Category: Plate]、Metal Thermal Spraying [Category: Plate]、Semiconductor Manufacturing [Category: Industry]、Smelting Copper or Lead [Category: Industry]、Pulp and Paper Processing [Category: Industry]、Painting (Pigments、Binders、and Biocides) [Category: Paint]、Applying Wood Preservatives [Category: Other]、Mining [Category: Industry]、Plastic Composites Manufacturing [Category: Industry]、Cleaning Furnaces or Flues [Category: Clean]、Leather Tanning and Processing [Category: Industry]、Photographic Processing [Category: Other]、Fur Dressing and Dyeing [Category: Industry]、Cement Producing [Category: Industry]、Textiles (Printing、Dyeing、or Finishing) [Category: Industry]、Welding Over Coatings [Category: Weld]、Silk-Screen Printing [Category: Other]、Glass Manufacturing [Category: Industry]、Metal Extraction and Refining [Category: Industry]、Ceramics making [Category: Hobbies]、Enameling [Category: Hobbies]、Painting [Category: Hobbies]、Glassblowing [Category: Hobbies]、Textile arts [Category: Hobbies]、Lithography printing [Category: Hobbies]、Smoking cigarettes [Category: Food & Drugs]、Living near chromium plating or chromate plant [Category: Environments]、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. 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.、For more Uses (Complete) data for CHROMIUM、ELEMENTAL (10 total)、please visit the HSDB record page.、Substance listed with specific concentration in tattoo ink and、or permanent make up according to EU Commission Regulation 2020、2081. The concentration limit (by weight) is 0.00005%.、Elemental chromium is used mainly for making steel. Hexavalent chromium is used for chrome plating、dyes and pigments、and wood preserving. (A12、L17)、Use Classification: Chemical Classes -> Inorganic substances、Industry Uses: Intermediate、Filler、Not Known or Reasonably Ascertainable、Chemical reaction regulator、Other、Alloys、Anti-adhesive、cohesive、Consumer Uses: Chemical reaction regulator、Pigment、Other (specify)、Household Products: Cosmetics product ingredient: Chromium and chromium compounds、Product count: 1、Information on 1 consumer products that contain Chromium in the following categories is provided:、• Auto Products、Methods of Manufacturing: 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. 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。
Chromium 是一种无机化合物，登记 CAS 号为 7440-47-3，分子式 Cr（分子量 51.996），归属于无机化学品大类化工原料。
登记 CAS 号：7440-47-3
其分子式 Cr 由 1 个铬 组成。
别名/同义词：Chromium · Chromium(III) atomic absorption standard solution · Chrome
所属分类：无机化学品
Chromium 的 CAS 登记号为 7440-47-3。
分子式 Cr，分子量 51.996。
别名/同义词：Chromium、Chromium(III) atomic absorption standard solution、Chrome。
登记用途：Uses: The metal chromium is used mainly for making steel and other alloys.、MINING、SMELTING、OR METALLURGY: Ore mining and crushing operations、Alloy production、Produce chromates from chromite、MANUFACTURING: Textile dyes、Paint pigments、Chrome plating、Leather tanning、Printing inks and toners、Photoengraving、Automotive & aircraft parts、Joint prostheses、Refractory bricks & kilns、USING: Heat or machine chromium alloys、Arc weld stainless steel、Spray paint Cr pigments、Mix and lay cement or concrete、Use water system corrosion inhibitors、wood preservatives、or glassware-cleansing solutions、Use hexavalent chromates in hardeners for epoxy resin sealants、Chromium(VI) is present also as an impurity in Portland cement、and can be generated and given off during casting、welding、and cutting operations involving stainless steel、even if chromium was not originally present in its hexavalent state. [ACGIH] Stainless steels are a group of iron-based alloys containing at least 10.5% chromium. Chromium is used to make stainless steel corrosion resistant. . . . In ferrochromium operations、trivalent (insoluble) chromium (Cr3+) predominates、but hexavalent (soluble) chromium (Cr6+) also occurs at low levels、usually at below 1 ug m-3. [PMID 26950803]、Steel Producing [Category: Industry]、Abrasive Blasting [Category: Clean]、Metal Preparation and Pouring [Category: Foundry]、Metal Machining [Category: Heat or Machine]、Welding [Category: Weld]、Electroplating [Category: Plate]、Metal Thermal Spraying [Category: Plate]、Semiconductor Manufacturing [Category: Industry]、Smelting Copper or Lead [Category: Industry]、Pulp and Paper Processing [Category: Industry]、Painting (Pigments、Binders、and Biocides) [Category: Paint]、Applying Wood Preservatives [Category: Other]、Mining [Category: Industry]、Plastic Composites Manufacturing [Category: Industry]、Cleaning Furnaces or Flues [Category: Clean]、Leather Tanning and Processing [Category: Industry]、Photographic Processing [Category: Other]、Fur Dressing and Dyeing [Category: Industry]、Cement Producing [Category: Industry]、Textiles (Printing、Dyeing、or Finishing) [Category: Industry]、Welding Over Coatings [Category: Weld]、Silk-Screen Printing [Category: Other]、Glass Manufacturing [Category: Industry]、Metal Extraction and Refining [Category: Industry]、Ceramics making [Category: Hobbies]、Enameling [Category: Hobbies]、Painting [Category: Hobbies]、Glassblowing [Category: Hobbies]、Textile arts [Category: Hobbies]、Lithography printing [Category: Hobbies]、Smoking cigarettes [Category: Food & Drugs]、Living near chromium plating or chromate plant [Category: Environments]、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. 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.、For more Uses (Complete) data for CHROMIUM、ELEMENTAL (10 total)、please visit the HSDB record page.、Substance listed with specific concentration in tattoo ink and、or permanent make up according to EU Commission Regulation 2020、2081. The concentration limit (by weight) is 0.00005%.、Elemental chromium is used mainly for making steel. Hexavalent chromium is used for chrome plating、dyes and pigments、and wood preserving. (A12、L17)、Use Classification: Chemical Classes -> Inorganic substances、Industry Uses: Intermediate、Filler、Not Known or Reasonably Ascertainable、Chemical reaction regulator、Other、Alloys、Anti-adhesive、cohesive、Consumer Uses: Chemical reaction regulator、Pigment、Other (specify)、Household Products: Cosmetics product ingredient: Chromium and chromium compounds、Product count: 1、Information on 1 consumer products that contain Chromium in the following categories is provided:、• Auto Products、Methods of Manufacturing: 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. 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。
所属分类：Inorganic Chemicals。
Chromium（CAS 7440-47-3）的公开数据库记录，列此仅供独立核对。
| GHS notification summary | 50% (1202 / 2404) |
|---|---|
| Reported hazard statements | H317 (20.7%), H319 (19.1%), H334 (20.3%), H335, H320, H341, H371, H400 |
This chemical does not meet GHS hazard criteria for 50% (1202 of 2404) of reports.
H317 (20.7%): May cause an allergic skin reaction [Warning Sensitization, Skin]
| Regulatory & Food Contact | CIR / INCI: Cosmetics ingredient -> Other (Specify) |
|---|---|
| GHS notification summary | 50% (1202 / 2404) |
| 沸点 | 4788 °F at 760 mmHg (NTP, 1992) |
|---|---|
| 沸点 | 2642 |
| 沸点 | 4788 ° F |
| 沸点 | 2642 °C |
| 沸点 | 4788 °F |
| 沸点 | 2671 °C @760 [mm Hg] |
| 熔点 | 3452 °F (NTP, 1992) |
| 熔点 | 1900 |
| 熔点 | 3452 °F |
| 熔点 | 1907 °C |
| CAS Registry Number | 7440-47-3 |
|---|---|
| PubChem CID | 23976 |
| 分子式 | Cr |
| IUPAC 名称 | chromium |
| UNII（FDA） | 0R0008Q3JB |
CHROMIUM; 7440-47-3; Chrome; Chromium metal; Chrom; Chromium, elemental; Dinakrome; BioChrome; DTXSID3031022; CHEBI:28073; 0R0008Q3JB; Dietary Chromium; Chromium Metallicum; RefChem:5683; lambda6-chromium(6+) ion; DTXCID1011022
| 分子量 | 51.996 |
|---|---|
| 氢键供体数 | 0 |
| 氢键受体数 | 0 |
| 可旋转键数 | 0 |
| 精确质量 | 51.940505 |
| 单同位素质量 | 51.940505 |
| 拓扑极性表面积 | 0 |
| 重原子数 | 1 |
| 形式电荷 | 0 |
| 复杂度 | 0 |
Chrome · CAS 7440-47-3 · Cr. UNII 0R0008Q3JB. 沸点: 4788 °F at 760 mmHg (NTP, 1992); 沸点: 2642; 沸点: 4788 ° F.
数据来源：PubChem / Wikidata；与随货 COA 不一致时以 COA 为准。