납 테트라아세트산
납테트라아세트산 · 납테트라아세트산(LEADTETRAACETATE) · 테트라아세트산 납 · 납 테트라아세테이트 · 납(IV) 아세테이트 · 아세트산 납 (Pb(O2C2H3)4) · 아세트산 납(IV) · 아세트산 제이납
식별자 및 물리적 특성
| CAS No. | 546-67-8 |
|---|---|
| 분자식 | C8H12O8Pb-2 |
| 평균 분자량 | 443 g/mol |
| SMILES | CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].[Pb+2] |
| InChIKey | ACKFDYCQCBEDNU-UHFFFAOYSA-J |
| PubChem CID | 11025 |
| EC No. | 208-908-0 |
| 현지명 | 납 테트라아세트산 |
화학 및 물리적 성질
| 극성 표면적 | 161 |
|---|---|
| 수소 결합 공여자 수 | 0 |
| 수소 결합 수용자 수 | 8 |
| 회전 가능 결합 수 | 0 |
| 무거운 원자 수 | 17 |
| 형식 전하 | -2 |
| 복잡도 | 25.5 |
| 물질 분류 | Metals -> Organic Acids, Metal Salts |
| 냄새 | LIKE ACETIC ACID OR VINEGAR |
| 밀도 | 2.2 at 68 °F (USCG, 1999) - Denser than waterwill sink2.228 at 17 °C/4 °C2,28 g/cm3 |
| Color/Form | Colorless monoclinic prisms from glacial acetic acidColorless or faintly pink crystals, sometimes moist with glacial acetic acid |
| 용해도 | Soluble in hot glacial acetic acid, benzene, chloroform, tetrachloroethane, nitrobenzene.에 용해됨클로로포름, 메탄올 (약간 용해됨) |
| Corrosivity | MAY CORRODE METALS WHEN MOIST |
| Decomposition | Hazardous decomposition products formed under fire conditions: Carbon oxides, lead oxides. |
| 녹는점 | 347 °F (USCG, 1999)175-180 °C |
| Physical Description | Faintly pink wet crystals with an odor of vinegar. (USCG, 1999)Colorless to pink solid from glacial acetic acid[Merck Index # 5423] |
| Stability/Shelf Life | Unstable in air |
| Other Experimental Properties | Turns pink easily. Unstable in air. Hydrolyzed by water with the formation of brown lead dioxide and acetic acid. Dissolves in concd halogen acids with the formation of haloplumbic acids, H2PbX6.Lead is derived from the decay of radon. /Inorganic lead/Natural lead is a mixture of four stable isotopes: Pb-204 (1.4%), Pb-206 (25.2%), Pb-207 (21.7%) and Pb-208 (51.7%). Lead isotopes are the end-products of each of the three series of naturally occurring radioactive elements: Pb-206 for the uranium series, Pb-207 for the actinium series and Pb-208 for the thorium series. Forty-three other isotopes of lead, all of which are radioactive, are recognized. |
| 끓는 점 | 118.1°C |
| 저장 조건 | Inert atmosphere,2-8°C |
| 물리적 상태 | 결정성 분말 |
| 색상 | 흰색에서 밝은 주황색-분홍색 |
| 비중 | 2.28 |
| 용해도 | 분해 |
| Merck | 14,5423 |
| BRN | 3595640 |
| 안정성 | 안정적인. 수분에 민감합니다. 물, 대부분의 금속과 호환되지 않습니다. |
| InChI | 1S/4C2H4O2.Pb/c4*1-2(3)4/h4*1H3,(H,3,4)/q+4/p-4 |
| InChIKey | JEHCHYAKAXDFKV-UHFFFAOYSA-J |
| SMILES | CC(=O)O[Pb](OC(C)=O)(OC(C)=O)OC(C)=O |
| NIST | Lead tetraacetate(546-67-8) |
| EPA | Lead(IV) acetate (546-67-8) |
화학적 성질
Lead tetraacetate (plumbic acetate), Pb(C2H3O2)4, is a colorless, monoclinic crystalline solid that is soluble in chloroform and in hot acetic acid, but decomposes in cold water and in ethyl alcohol. Lead tetraacetate can be prepared by adding warm, water-free, glacial acetate acid to red lead, Pb3O4, and subsequent cooling. The salt decomposes with the addition of water to give PbO2, but the yield can be improved by passing in chlorine gas. Lead tetraacetate is available in laboratory quantities as colorless to faintly pink crystals stored in glacial acetic acid.
안전 및 규제
| GHS 분류 | DangerH302+H332 (59.3%): Harmful if swallowed or if inhaled [Warning Acute toxicity, oralacute toxicity, inhalation]P203, P260, P261, P264, P270, P271, P273, P280, P301+P317, P304+P340, P317, P318, P319, P330, P391, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 177 reports by companies from 8 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.H302: Harmful if swallowed [Warning Acute toxicity, oral] |
|---|---|
| 규제 정보 | Chemical: Acetic acid, lead(4+) saltStatus: Cease Manufacture Update: 02-11-2010 https://echa.europa.eu/registration-dossier/-/registered-dossier/1560Restricted substance: Lead tetraacetateLead tetraacetate: HSNO Approval: HSR006169 Approved with controls |
| 기타 안전 정보 | IMAP assessments - Lead acetates: Human health tier II assessment |
| 운송 라벨(DOT) | Poison |
| 화재 위험 | Behavior in Fire: Can increase the intensity of a fire when in contact with combustible material. Cool containers with plenty of water. (USCG, 1999) |
| 화재 가능성 | Not flammable ... Can increase intensity of fire when in contact with combustible material. |
| 건강 유해성 | Early symptoms of lead intoxication by ingestion are most commonly gastrointestinal disorders, colic, constipation, etc.weakness, which may go on to paralysis chiefly of the extensor muscles of the wrists and less often of the ankles, is noticeable in the most serious cases. Ingestion of a large amount causes local irritation of the alimentary tractpain, leg cramps, muscle weakness, paresthesias, depression, coma, and death may follow in 1 or 2 days. Contact causes severe irritation of eyes and can burn skin. (USCG, 1999) |
| 유해성 요약 | Contact causes severe irritation of eyes and can burn skin[CAMEO] Toxic substance that can be absorbed through skin[Hawley] See Lead and linked occupational diseases. |
| 반응성 그룹 | Oxidizing Agents, Strong |
| Special Reports |
용도
개요
Lead (IV) acetate or lead tetraacetate is a chemical compound with chemical formula Pb(C2H3O2)4 and is a lead salt of acetic acid. It is commercially available often stabilized with acetic acid.
용도
Oxidation with lead tetraacetate is often used in organic syntheses, because the lead salt is highly selective in the splitting of vicinal glycols. The rate of oxidation of cis glycols is more rapid than of the trans isomers, a property widely used in the structural determination of sugars and other polyols. Lead tetraacetate readily cleaves α-hydroxy acids as oxalic acid at room temperature. Another use is the introduction of acetoxy groups in organic molecules, as in the preparation of cyclohexyl acetate and the acetoxylation of cyclohexanol. At high temperature, methylation takes place. In these reactions, the organic molecule must contain double bonds or activating substituents.
일반 설명
Faintly pink wet crystals with an odor of vinegar.
제조 및 합성 방법
제조 방법
Lead tetraacetate can be prepared by reaction of red lead with acetic acid The other main lead acetate is lead (II) acetate.