Calcium Sulfate Dihydrate
Calcium Sulfate Dihydrate
CAS: 10101-41-4
Molecular Formula: CaSO4·2H2O
Calcium Sulfate Dihydrate - Names and Identifiers
| Name | Calcium Sulfate Dihydrate |
| Synonyms | C.I. 77231 Plaster Stone C.I.Pigment White 25 Calcium Sulfate Dihydrate Calcium sulphate dihydrate |
| CAS | 10101-41-4 |
| EINECS | 231-900-3 |
| InChI | InChI=1/Ca.H2O4S.2H2O/c;1-5(2,3)4;;/h;(H2,1,2,3,4);2*1H2/q+2;;;/p-2 |
| InChIKey | PASHVRUKOFIRIK-UHFFFAOYSA-L |
Calcium Sulfate Dihydrate - Physico-chemical Properties
| Molecular Formula | CaSO4·2H2O |
| Molar Mass | 172.17 |
| Density | 2.32 |
| Melting Point | 128°C -1.5H₂O |
| Boling Point | 330°C at 760 mmHg |
| Water Solubility | 2 g/L (20℃) |
| Solubility | Insoluble in water (0.241g/100ml water), soluble in acid, ammonium salt, sodium thiosulfate and glycerol. Slightly soluble in water. Soluble in hydrochloric acid. Slightly soluble in hot water 2g/L (20°C). Soluble in hydrochloric acid, alcohol and most organic solvents. |
| Vapor Presure | 3.35E-05mmHg at 25°C |
| Appearance | Shape powder, color White |
| PH | 7.0 (50g/l, H2O, 20℃)(slurry) |
| Storage Condition | Store at +5°C to +30°C. |
| Stability | Stable. Incompatible with aluminium, strong acids. |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00149625 |
| Physical and Chemical Properties | Characteristics of monoclinic system, the crystal is plate-like, columnar, aggregate is dense Block, fibrous, plate-like, soil-like or kidney-like. Glass gloss. relative density 2.32g/cm3 solubility slightly soluble in water. Soluble in hydrochloric acid. colorless monoclinic crystalline powder. When the relative density is 2.32.128 ℃, the hemihydrate is formed by losing 1.5H2O, and the anhydrous substance is formed by losing all crystal water when heated to 163 ℃. Insoluble in water (0.241g/mL water), soluble in acid, ammonium salt, sodium thiosulfate and glycerol. |
| Use | Used as a cement raw material is a raw material for manufacturing cement, calcium sulfate hemihydrate and sulfuric acid. It is used as a filler in the paint and paper industry. Agricultural use as a fertilizer, can reduce soil alkalinity, improve soil performance. Food grade can be used with nutritional supplements (calcium fortification), coagulant, yeast food, dough regulator, chelating agent, also used as tomato, potato canned tissue fortifier, brewing water hardening agent, wine flavor enhancer, etc. |
Calcium Sulfate Dihydrate - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 1 |
| RTECS | EW4150000 |
| TSCA | Yes |
| HS Code | 28332990 |
| Toxicity | LD50 orally in Rabbit: > 10000 mg/kg |
Calcium Sulfate Dihydrate - Upstream Downstream Industry
Calcium Sulfate Dihydrate - Reference
| Reference Show more | 1. [IF=4.36] Fangfang Xu et al."Mechanism deconvolution of Qing Fei Pai Du decoction for treatment of Coronavirus Disease 2019 (COVID-19) by label-free integrative pharmacology assays."J Ethnopharmacol. 2021 Nov 15; 280: 114488 |
Calcium Sulfate Dihydrate - Nature
Open Data Verified Data
colorless monoclinic crystalline powder. The relative density was 2. 32. A hemihydrate was formed by losing 1-5H2 0 at 128 ° C., and an anhydrate was formed by losing all the crystal water by heating to 163 ° C. Fig. Insoluble in water (0.241G/lOOmL water), soluble in acid, ammonium salt, sodium thiosulfate and glycerol.
Last Update：2024-01-02 23:10:35
Calcium Sulfate Dihydrate - Preparation Method
Open Data Verified Data
- The natural gypsum ore in addition to the net impurities, soil by calcination and grinding.
- sodium sulfate was added to a by-product (calcium chloride) of alkali production by ammonia-alkali method, and the reaction product was purified to obtain calcium sulfate dihydrate.
- by-products in the production of organic acids. For example, calcium oxalate, a by-product in the production of oxalic acid, is decomposed with sulfuric acid, and then refined to obtain calcium sulfate dihydrate.
Last Update：2022-01-01 11:04:10
Calcium Sulfate Dihydrate - Introduction
No smell. It's hygroscopic. 1 1/2 sub-crystal water was lost at 128 ℃ and all water was lost at 163 ℃. Soluble in acid, sodium thiosulfate and ammonium salt solution, soluble in 400 parts of water, less dissolved in hot water, very slowly soluble in glycerin, almost insoluble in alcohol and most organic solvents. It's irritating.
Last Update：2022-10-16 17:11:28
Calcium Sulfate Dihydrate - Use
Open Data Verified Data
is a raw material for the manufacture of cement, calcium sulfate hemihydrate and sulfuric acid. It is used as a filler in the paint and paper industry. Agricultural use as a fertilizer, can reduce soil alkalinity, improve soil performance. Food grade can be used as nutritional supplements (calcium fortification), coagulant, yeast food, dough regulator, chelating agent, also used as tissue fortifier in canned tomato, potato, brewing water hardening agent, wine flavor enhancer, etc.
Last Update：2022-01-01 11:04:10
Calcium Sulfate Dihydrate - Safety
Open Data Verified Data
packed in woven plastic bags lined with polyethylene plastic bags (food-grade polyethylene plastic bags for food use). The net weight of each bag is 25kg. Food-grade products should have obvious production date and "Food Additives" on the outer packaging bag. Store in a dry, clean warehouse. Food-grade products should be protected from toxic pollution, and are not allowed to be stored and mixed with toxic substances. Should pay attention to moisture-proof, moisture-proof.
Last Update：2022-01-01 11:04:11
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Raw Materials for Calcium Sulfate Dihydrate
Downstream Products for Calcium Sulfate Dihydrate