基本情報
- CAS
11130-49-7- 標準SMILES
[C-]#[Cr].[C-]#[Cr].[Cr+2]- InChIKey
GVEHJMMRQRRJPM-UHFFFAOYSA-N- 分子式
- C2Cr3
- 平均分子量
- 180.01 g/mol
- 単同位体質量
- 179.821514
概要
Chromium carbide is a chemical compound of chromium that occurs rarely as the mineral tongbaite. It is used as a thermal spray material for protecting underlying metal surfaces, as an additive to corrosion-resistant and wear-resistant materials, in coatings of bearings, seals, orifices, and valve seals, and as a fine-crystal phase in other sintered carbides, where it inhibits growth of submicrometre grains during pressing and sintering. Chromium is a chemical element which has the symbol Cr and atomic number 24. It is found naturally occuring in rocks, animals, plants, and soil, and is usually mined as chromite ore. Chromium is most toxic in its +6 oxidation state (chromium(VI)) due to its greater ability to enter cells and higher redox potential. Trivalent chromium (chromium(III)) however, is biologically necessary for sugar and lipid metabolism in humans. (L17, L516)
名称と識別子
- 優先名称
- Chromium carbide
- IUPAC
- chromium(2+);methanidylidynechromium
- 英語名
- Chromium carbide
- 分子量
- 0
名称と別名
CHROMIC CARBIDEDTXSID209395411130-49-7(((chromiumylidynemethyl)chromio)methylidyne)chromium{[(chromiumylidynemethyl)chromio]methylidyne}chromiumRefChem:576886DTXCID801765798DTXSID301057188235-160-2601-073-712012-35-0chromium carbide
名称をさらに表示
Chromium carbide (Cr3C2)EC 234-576-1EINECS 234-576-1chromium(2+);methanidylidynechromiumMFCD00016041Chromium carbide, -325 meshAKOS015914326Chromium carbide Cr3C2 GRADE 160 (H?gan?s)
データベース識別子
- CAS
11130-49-7、12012-35-0- PubChem CID
- 3650773
- DTXSID
DTXSID2093954- EC Number
- 601-073-7
物性
構造計算による物性
- 極性表面積
- 0 Ų
- 水素結合供与体数
- 0
- 水素結合受容体数
- 2
- 回転可能結合数
- 0
- 重原子数
- 5
- 形式電荷
- 0
- 複雑度
- 28.9
実験および物理化学的性質
Chemical ClassesMetals -> Chromium Compounds, Inorganic
SpringerMaterials Properties
thermal expansion coefficient
thermal expansion coefficient
phase equilibrium
crystal structure
thermal expansion coefficient
Physical Description
Other Solid; Dry Powder
Crystals; [Hawley]
安全と法規制
安全情報は参考情報です。供給元の安全データシート（SDS）、適用法令、専門家による評価に代わるものではありません。
危険有害性情報
Regulatory Information
Chemical: Chromium carbide (Cr3C2)
Chromium carbide (Cr3C2) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Chromium carbide (Cr3C2) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)
Hazards SummaryMay be harmful after ingestion, inhalation, or skin contact; May damage eyes; Stable under recommended storage conditions. [MSDSonline] See CARBIDES. See Chromium.
安全と保護具
Threshold Limit Values (TLV)0.5 [mg/m3], as Cr
Permissible Exposure Limit (PEL)0.5 [mg/m3], as Cr
毒性情報
TreatmentThere is no know antidote for chromium poisoning. Exposure is usually handled with symptomatic treatment. (L16)
Health EffectsChromium in its trivalent state is not very toxic. It may be oxidized to hexavalent chromium, a known carcinogen. Hexavalent chromium has also been shown to affect reproduction and development. (A12)
Exposure RoutesOral (L16) ; inhalation (L16) ; dermal (L16)
Toxicity Summary
Trivalent chromium may also form complexes with peptides, proteins, and DNA, resulting in DNA-protein crosslinks, DNA strand breaks, DNA-DNA interstrand crosslinks, chromium-DNA adducts, chromosomal aberrations and alterations in cellular signaling pathways. It has been shown to induce carcinogenesis by overstimulating cellular regulatory pathways and increasing peroxide levels by activating certain mitogen-activated protein kinases. It can also cause transcriptional repression by cross-linking histone deacetylase 1-DNA methyltransferase 1 complexes to CYP1A1 promoter chromatin, inhibiting histone modification. Chromium may increase its own toxicity by modifying metal regulatory transcription factor 1, causing the inhibition of zinc-induced metallothionein transcription. (A12, L16, A34, A35, A36)
化学と産業
薬理情報
Metabolism/Metabolites
Chromium is absorbed from oral, inhalation, or dermal exposure and distributes to nearly all tissues, with the highest concentrations found in kidney and liver. Bone is also a major storage site and may contribute to long-term retention. Hexavalent chromium's similarity to sulfate and chromate allow it to be transported into cells via sulfate transport mechanisms. Inside the cell, hexavalent chromium is reduced first to pentavalent chromium, then to trivalent chromium by many substances including ascorbate, glutathione, and nicotinamide adenine dinucleotide. Chromium is almost entirely excreted with the urine. (A12, L16)
用途と製造
Uses
Used in extrusion dyes, pumps, valves, and spray-on coatings; [Hawley]
Chromium carbide is used as a thermal spray material for protecting underlying metal surfaces, as an additive to corrosion-resistant and wear-resistant materials, in coatings of bearings, seals, orifices, and valve seals, and as a fine-crystal phase in other sintered carbides, where it inhibits growth of submicrometre grains during pressing and sintering. (L516)
U.S. Production2023: <75,000 lb
Consumer UsesNot Known or Reasonably Ascertainable
Industry UsesAlloys
General Manufacturing Information
Paint and Coating Manufacturing
Chromium carbide (Cr3C2): ACTIVE
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