산화칼슘(생석회)
석회 · 소화되지않은석회 · 조약돌석회 · 칼슘모노산화물 · 칼실(CALXYL)생석회 · 탄석회(BURNTLIME)부식제석회 · 산화칼슘 · 산화칼슘(생석회)
식별자 및 물리적 특성
| CAS No. | 1305-78-8 |
|---|---|
| 분자식 | CaO |
| 평균 분자량 | 56.08 g/mol |
| SMILES | [O]=[Ca] |
| InChIKey | ODINCKMPIJJUCX-UHFFFAOYSA-N |
| PubChem CID | 14778 |
| ChEMBL | CHEMBL5314372 |
| ChEBI | CHEBI:31344 |
| EC No. | 215-138-9 |
| 현지명 | 산화칼슘(생석회) |
화학 및 물리적 성질
| 극성 표면적 | 17.1 |
|---|---|
| 수소 결합 공여자 수 | 0 |
| 수소 결합 수용자 수 | 1 |
| 회전 가능 결합 수 | 0 |
| 무거운 원자 수 | 2 |
| 형식 전하 | 0 |
| 복잡도 | 2 |
| 물질 분류 | Other Classes -> BasesCorrosives |
| 화장품 | Buffering |
| pH | SATURATED SOLN IN WATER IS ABOUT 12.812.6 (H2O, 20℃)(saturated solution) |
| SpringerMaterials Properties | thermal expansion coefficient |
| 농약 | Agrochemicals -> Pesticide active substancesActive substance -> EU Pesticides database: Not approved |
| 냄새 | Odorless무취 백색 회색 결정 또는 분말 |
| 식품 첨가물 | ANTICAKING AGENT OR FREE-FLOW AGENT, DOUGH STRENGTHENER, FIRMING AGENT, NUTRIENT SUPPLEMENT, PH CONTROL AGENT, PROCESSING AID, TEXTURIZER -> FDA Substance added to food |
| 밀도 | 3.3 at 68 °F (USCG, 1999) - Denser than waterwill sink3.34 g/cu cmRelative density (water = 1): 3.3-3.43.37 @25 °C3.3 g/mL at 25 °C (lit.) |
| Color/Form | Grey-white, cubic crystalsColorless, cubic, white crystalsCrystals, white or grayish white lumps, or granular powderGreyish-yellow, hydroscopic lumps |
| 용해도 | Reacts with water (NIOSH, 2024)Slightly soluble in water. Insoluble in ethanol. Soluble in glycerolReacts with waterSoluble in water forming calcium hydroxide and generating large a quantity of heat.Soluble in acids, glycerol, sugar solutionpractically insoluble in alcohol1 g is sol in about 840 mL water and 1740 mL boiling water1.65g/l 격렬한 반응의 위험이 있습니다. |
| Corrosivity | Corrosive |
| 인화점 | Not flammable2850°C |
| 녹는점 | 2570 °C |
| 끓는 점 | 2850 °C (lit.) |
| 굴절률 | 1.83 |
| 저장 조건 | no restrictions. |
| 물리적 상태 | 가루 |
| 색상 | 흰색~노란색~아주 약간 베이지색 |
| 비중 | 3.3 |
| 용해도 | 물과 반응 |
| 비열 | Cp(crystal): 0.75 J/(g·K), at 25℃ |
| Merck | 14,1686 |
| 유전율 | 2.2(Ambient) |
| 안정성 | 안정적이지만 공기 중 이산화탄소를 흡수합니다. 물, 습기, 불소, 강산과 호환되지 않습니다. |
| 화장품 원료 기능 | 버퍼링 |
| InChI | 1S/Ca.O |
| InChIKey | ODINCKMPIJJUCX-UHFFFAOYSA-N |
| SMILES | O=[Ca] |
| NIST | Calcium monoxide(1305-78-8) |
| EPA | Calcium oxide (1305-78-8) |
화학적 성질
Calcium oxide, CaO, occurs as white or grayish-white lumps or granular powder. The presence of iron gives it a yellowish or brownish tint.
안전 및 규제
| GHS 분류 | This chemical does not meet GHS hazard criteria for 5.1% (130 of 2552) of reports.DangerH302 (18.2%): Harmful if swallowed [Warning Acute toxicity, oral]P260, P261, P264, P264+P265, P270, P271, P280, P301+P317, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P319, P321, P330, P332+P317, P362+P364, P363, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 2552 reports by companies from 66 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.Not Classified |
|---|---|
| 규제 정보 | Chemical: Calcium oxideCalcium oxide (CaO) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Calcium oxide (CaO) 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)2002/2076Status: Cease Manufacture Update: 01-05-2018 https://echa.europa.eu/registration-dossier/-/registered-dossier/24348Calcium oxide: Does not have an individual approval but may be used under an appropriate group standardThe New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.) |
| 기타 안전 정보 | IMAP assessments - Calcium oxide: Environment tier I assessment |
| 운송 라벨(DOT) | Corrosive |
| 화재 위험 | Excerpt from ERG Guide 157 [Substances - Toxic and/or Corrosive (Non-Combustible / Water-Sensitive)]:· Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.Not combustible. |
| 화재 가능성 | Not combustible, but bulk powder may heat spontaneously when damp with water. |
| 건강 유해성 | Causes burns on mucous membrane and skin. Inhalation of dust causes sneezing. (USCG, 1999)· TOXIC and/or CORROSIVEinhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. |
용도
역사
Calcium oxide dates from prehistoric times. It is produced by heating limestone to drive off carbon dioxide in a process called calcination: CaCO3(s) CaO(s) + CO2(g). At temperatures of several hundred degrees Celsius, the reaction is reversible and calcium oxide will react with atmospheric carbon dioxide to produce calcium carbonate. Efficient calcium oxide production is favored at temperatures in excess of 1,000°C. In prehistoric times limestone was heated in open fires to produce lime. Over time, lined pits and kilns were used to produce lime. Brick lime kilns were extensively built starting in the 17th century and the technology to produce lime has remained relatively constant since then.
용도
Calcium Oxide is a general food additive consisting of white granules or powder of poor water solubility. it is obtained by heating limestone (calcium carbonate) in a furnace. it is also termed lime or quicklime. it is used as an anticaking agent, firming agent, and nutritive supple- ment in applications such as grain products and soft candy.
일반 설명
Calcium oxide appears as an odorless, white or gray-white solid in the form of hard lumps. A strong irritant to skin, eyes and mucous membranes. Used in insecticides and fertilizers.
제조 및 합성 방법
생산 방법
Calcium oxide is commercially obtained from limestone. The carbonate is roasted in a shaft or rotary kiln at temperatures below 1,200°C until all CO2 is driven off. The compound is obtained as either technical, refractory or agri cultural grade product. The commercial product usually contains 90 to 95% free CaO. The impurities are mostly calcium carbonate, magnesium carbon ate, magnesium oxide, iron oxide and aluminum oxide.