硫酸カルシウム·2水和物
硫酸カルシウム·2水和物 · 石こう · 硫酸カルシウム二水和物 · 石膏 · 硫酸カルシウム (2水和物) (別名: 石膏、二水石膏、軟石膏) · 硫酸カルシウム,2水和物 · 硫酸カルシウム二水和物 ACS REAGENT,98% · 硫酸カルシウム二水和物 PURISS.,MEETS ANALYTICAL SPECIFICATION OF NF,E 516,99.0-101.0% (BASED ON ANHYDROUS SUBSTANCE)

識別子と物理属性
| CAS No. | 10101-41-4 |
|---|---|
| 分子式 | CaSO4.2H2O |
| 平均分子量 | 172.17 g/mol |
| 単同位体質量 | 171.93544983 g/mol |
| SMILES | O.O.O=S(=O)([O-])[O-].[Ca+2] |
| InChIKey | PASHVRUKOFIRIK-UHFFFAOYSA-L |
| PubChem CID | 24928 |
| ChEBI | CHEBI:32583 |
| EC No. | 600-148-1 |
| DTXSID | DTXSID7047514 |
| 現地名 | 硫酸カルシウム·2水和物 |
化学・物理的性質
| 極性表面積 | 90.6 |
|---|---|
| 水素結合供与体数 | 2 |
| 水素結合受容体数 | 6 |
| 回転可能結合数 | 0 |
| 重原子数 | 8 |
| 形式電荷 | 0 |
| 複雑度 | 62.2 |
| 物質分類 | Mineral Dusts -> Other Mineral DustsMetals -> Metals, Inorganic Compounds |
| 密度 | 2.32 (NIOSH, 2024) - Denser than waterwill sink2.32 g/cm³ |
| 溶解度 | 0.2 % at 77 °F (NIOSH, 2024)Solubility in water, g/100ml at 20 °C: 0.2 (very poor)(77 °F): 0.2%H2O: 0.01M at20℃、透明、無色2g/L(20℃) |
| Animal Drugs | Pharmaceuticals -> UK Veterinary Medicines Directorate List |
| 融点 | 262 to 325 °F (Loses H2O) (NIOSH, 2024)100-150 °C262-325 °F (loses H₂O)262-325 °F (Loses H2O)128°C -1.5H₂O |
| 蒸気圧 | 0 mmHg (approx) (NIOSH, 2024) |
| Physical Description | Gypsum appears as white or nearly white, odorless, crystalline solid.Dry PowderOther SolidCBIWhite or nearly white, odorless, crystalline solidWhite to slightly yellowish-white odorless solid[Merck Index] Colorless hygroscopic solid[OECD SIDS: Calcium sulfate, dihydrate - 2003] White powder[Sigma-Aldrich MSDS]CRYSTALLINE POWDER. |
| 沸点 | 163°C -2H₂O |
| 引火点 | 163°C -2H₂O |
| 貯蔵条件 | Store at +5°C to +30°C. |
| 外観・状態 | 粉 |
| 色 | 白い |
| 比重 | 2.32 |
| pH | 7.0 (50g/l, H2O, 20℃)(slurry) |
| 臭い | 100.00%で。無臭 |
| Merck | 14,1706 |
| 誘電率 | 2.5(Ambient) |
| 安定性 | 安定。アルミニウム、強酸とは相容れない。 |
| 化粧品成分の機能 | 着色剤不透明剤増量剤研磨剤 |
| InChI | 1S/Ca.H2O4S.2H2O/c1-5(2,3)4/h(H2,1,2,3,4)2*1H2/q+2/p-2 |
| InChIKey | PASHVRUKOFIRIK-UHFFFAOYSA-L |
| SMILES | O.O.[Ca++].[O-]S([O-])(=O)=O |
| LogP(分配係数) | -1.031 (est) |
| CAS データベース | 10101-41-4(CAS DataBase Reference) |
| NISTの化学物質情報 | calcium sulfate(10101-41-4) |
| EPAの化学物質情報 | Calcium sulfate dihydrate (10101-41-4) |
化学的特性
石膏せっこうは自然界に広く存在する鉱物で主に硫酸カルシウム二水和物CaSO4・2H2Oから構成されますこの物質はその特性と用途の多様性のため古代エジプト時代から建材として利用されていました
化学的特性
monoclinic; hardness 1.5–2.0 Mohs; lumps or white powder(s); used in manufacturing portland cement, plaster of paris and artificial marble [KIR78] [MER06] [STR93]
化学性质
白色粉末,微溶于水
安全性と法規制
| GHS 分類 | This chemical does not meet GHS hazard criteria for 100% (278 of 278) of all reports.Not ClassifiedAggregated GHS information provided per 278 reports by companies from 2 notifications to the ECHA C&L Inventory.This chemical does not meet GHS hazard criteria for 100% (40 of 40) of all reports.Aggregated GHS information provided per 40 reports by companies from 1 notifications to the ECHA C&L Inventory. |
|---|---|
| 規制情報 | Chemical: Sulfuric acid, calcium salt, dihydrateDirective (EC) No 46/2002Gypsum (Ca(SO4).2H2O) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Gypsum (Ca(SO4).2H2O) 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)Sulfuric acid, calcium salt (1:1), dihydrate is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Sulfuric acid, calcium salt (1:1), dihydrate 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)Calcium sulfate dihydrate: Does not have an individual approval but may be used under an appropriate group standardGypsum (Ca(SO4).2H2O): Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right. |
| その他の安全情報 | IMAP assessments - Sulfuric acid, calcium salt, dihydrate: Human health tier I assessment |
| 火災危険 | Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. |
| 健康有害性 | Excerpt from NIOSH Pocket Guide for Gypsum: |
| 有害性の概要 | A cross-sectional study of 241 British gypsum miners in Sussex and Nottinghamshire with over 20 years of exposure identified x-ray findings consistent with a simple pneumoconiosis. Sixty-four miners had >1/0 on the ILO scale and 3 miners had 2/1 or greater. The authors attributed the higher rates of slight pneumoconiosis in the Sussex miners to the higher levels of quartz in these mines where the levels of gypsum dust were lower. [ACGIH] See Calcium sulfate.Not a skin irritant in rabbitsNo evidence of skin sensitization in guinea pigsDecreased total protein, albumin, BUN, AST, ALT, and creatinine observed in males at 300 and 1,000 mg/kg/day in repeated-dose oral study of rats (possible effect on excretion, distribution, or metabolism relating to the kidney) |
用途
解説
硫酸塩鉱物の一つ。雪花石膏(せっかせっこう)ともいう。石膏の微細結晶の塊状集合で、多くは白色。純粋なものは半透明。堆積(たいせき)岩中に層状をなして産し、岩塩など塩類鉱床や石油鉱床に伴われ、また石灰岩とも共存する。不純物として、粘土鉱物、方解石、硬石膏、いわゆる褐鉄鉱などを含むことがある。古代エジプトや古代ギリシアで彫像、工芸品などに用いられた。いまでもイタリアなどで、この目的で採掘されている。良質のものは彫刻用素材として珍重されるが、日本では岩塩鉱床を欠くので、この目的の使用に耐えるものはまったく産しない。命名は、エジプトの地名アラバストロンAlabastronにちなむとされる。
用途
セメント?ボード?プラスター原料、医薬部外品添加物 (薬用石けん、化粧品等)、食品添加物 (豆腐凝固剤)、農薬 (植物成長調整剤) (NITE調査)
用途
食品のCa強化剤。
使用
Calcium Sulfate Dihydrate is obtained from gypsum, a naturally occurring compound. Also used in the preparation of calcium sulfate and calcium sulfoaluminate.
製法・合成法
合成方法
硫酸与水酸化カルシウム反应生成
純化方法
It loses only part of its H2O at 100-150o (see below). It is soluble in H2O and very slowly soluble in glycerol. It is insoluble in most organic solvents.