UNII-2612HC57YE
Calcium oxalate
CAS: 563-72-4
Molecular Formula: C2H4CaO4
UNII-2612HC57YE - Names and Identifiers
| Name | Calcium oxalate |
| Synonyms | RAPHIDES UNII-2612HC57YE CALCIUM OXALATE Calcium oxalate Oxalic acid calcium calcium ethanedioate Calciumoxalat-1-hydrat Ethanedioic acid,calcium salt |
| CAS | 563-72-4 |
| EINECS | 209-260-1 |
| InChI | InChI=1/C2H2O4.Ca/c3-1(4)2(5)6;/h(H,3,4)(H,5,6);/q;+2/p-2 |
UNII-2612HC57YE - Physico-chemical Properties
| Molecular Formula | C2H4CaO4 |
| Molar Mass | 132.13 |
| Density | 2.2 g/mL at 25 °C (lit.) |
| Melting Point | decomposes [CRC10] |
| Boling Point | 365.1°C at 760 mmHg |
| Flash Point | 188.8°C |
| Water Solubility | g/L solution H2O: 0.0069 (25°C), 0.0142 (95°C); solid phase, CaC2O4 ·H2O [KRU93]; soluble dilute HCl, HNO3 [HAW93] |
| Vapor Presure | 2.51E-06mmHg at 25°C |
| Appearance | White crystalline powder |
| Color | White |
| Merck | 13,1690 |
| Storage Condition | Room Temprature |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| MDL | MFCD00012474 |
| Physical and Chemical Properties | Density 2.20 |
| Use | It is used as an analytical reagent, as a carrier for the separation of rare metals, and also for the preparation of oxalate |
UNII-2612HC57YE - 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. R21/22 - Harmful in contact with skin and if swallowed. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
UNII-2612HC57YE - Reference
| Reference Show more | 1. Huang Jinfang, Li Xiaoyan, Huang Xiaoqiang, Wu Tingting, Xu Wen, Wu aquatic. Study on compatibility of effective components of Rhizoma alismatis against calcium oxalate crystallization in vitro based on uniform design [J]. Chinese Herbal Medicine, 2016,47(23):4160-4165. |
UNII-2612HC57YE - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| calcium oxalate stone | calcium oxalate stone is also called urinary stone, calcium oxalate accounted for 70% ~ 80%. Oxalic acid is a common component of herbs, easy to enter the human body through the respiratory tract, digestive tract and skin mucosa. Because of the nature of the strong acid, adults who take 2 grams -5 grams may lead to death. Scientific research has confirmed that the daily feeding of 6 grams of oxalic acid to 12 grams of oxalic acid during pregnancy, oxalic acid can pass through the placental barrier, resulting in the deposition of oxalate crystals in the kidneys of lambs. when analyzing the causes of urinary stones in adults, the medical profession found that some women, in pursuit of a slim figure, eat meat and staple foods for a long period of time, and the main substitutes are fruits and vegetables, too much oxalic acid in fruits and vegetables, prompting them to become patients with urinary stones. Once the oxalate stone is formed, it is difficult to dissolve and disappear by itself. to prevent the formation of calcium oxalate stones, we must pay attention to adjust the diet structure, not only to reduce the oxalic acid in the food, but also to prevent the diet of foods with high oxalic acid content and foods with high calcium content, such as spinach and high calcium soy products, milk, is easy to form calcium oxalate with food. When the ratio of calcium to oxalic acid is 1:2, calcium oxalate stones are most easily formed. If you must eat this way, you can put the high oxalic acid vegetables into boiling water for 1 minutes, after oxalic acid dissolved in water before eating. If people who take calcium regularly to supplement calcium, they should pay more attention to it, In addition to the above treatment of high oxalic acid food, the time of taking the drug is best and the time of eating is staggered by more than 2 hours. In addition, xylitol into the body after the final metabolism of oxalic acid by the kidney excretion, if a short or long time intake of xylitol, can make the serum oxalic acid level suddenly or slowly increased, beyond the physiological saturation, it is easy to form crystals deposited into the kidney, leading to renal damage and even acute renal failure. |
| oxalic acid | oxalic acid is the simplest dicarboxylic acid, also known as oxalic acid, colorless and transparent crystals at room temperature, usually contains two molecules of crystal water, heated to 100.1 deg C when the loss of crystal water, into anhydrous oxalic acid. Toxic, harmful to the human body. Hygroscopic, soluble in ethanol, soluble in water, slightly soluble in ether. Insoluble in benzene and chloroform. oxalic acid can form water-soluble complexes with many metals. Because the molecule is directly linked by two carboxyl groups, its acidity is stronger than other binary organic acids, and the acidity is 10000 times that of acetic acid. Has a strong reduction, and the role of the oxidant is easy to be oxidized to carbon dioxide and water. In acidic solution, oxalic acid can be quantitatively oxidized by potassium permanganate, so that potassium permanganate solution is reduced to Divalent manganese and discolored, and oxalic acid with crystal water is easy to purify the crystal, commonly used in capacity analysis. Carbon dioxide, carbon monoxide and water can be generated by decomposition at 189.5 ℃ or in case of concentrated sulfuric acid. The laboratory can use oxalic acid thermal decomposition to produce carbon monoxide gas. In human urine also contains a small amount of oxalic acid, calcium oxalate is the main component of urethral calculi. |
| Use | calcium oxalate is insoluble in water and acetic acid, soluble in nitric acid and hydrochloric acid, and generates CaCO3 or CaO by ignition and heating. Mixed with refined CaCl2 into dilute aqueous solution, and oxalic acid aqueous solution of co-heat to make the two reaction, precipitation, dissolved in hot hydrochloric acid, after adding ammonia and precipitation, the latter is washed with hot water, the monohydrate was dried at 105 °c. Calcium oxalate can be used in the production of oxalic acid, in the industry for the production of lubricating oil ester, waterproof agent. used as an analytical reagent, as a carrier for the separation of rare metals, also used in the preparation of oxalate |
| Crystal | calcium oxalate crystal is a secondary metabolite in the process of plant growth and development, which widely exists in plant tissue cells. In the process of growth and development of each plant, the crystal type, shape and size of tissue cells are relatively stable, that is, the crystal is in the medicinal tissues of different families and genera, and its morphology, there are some differences in size and distribution. According to this feature in microscopic identification, can be used to identify different species, genus of medicinal materials or as an auxiliary basis for the classification of unknown medicinal materials. calcium oxalate crystals are divided into tetragonal system and monoclinic system according to different crystal properties, which is due to the difference in the amount of crystal water contained in the crystal. Tetragonal crystal system contains 3 crystal water, there are square crystal, sand Crystal, columnar crystal, cluster crystal and other types. Monoclinic system contains 1 crystal water, mostly in the form of needle crystal, the reason for its formation may be due to the cells often contain mucus and more viscous, crystal deposition speed caused. Calcium oxalate crystals do not dissolve in Chloral Hydrate solution, also do not dissolve in dilute acetic acid, dissolved in dilute hydrochloric acid without bubbles, sulfuric acid formation needle-like calcium sulfate crystals. According to the morphological classification method Pobeg-uin, calcium oxalate crystals are classified into three categories: 1, cluster crystals (including Lotus crystals, spherulites, and Poly crystals). 2, single crystal (including square crystal, sand Crystal, rhombus crystal and crystal with long and short diameter approximation-). 3, needle Crystal (including columnar crystal, Rod Crystal, Rod crystal). |
| solubility in water (g/100ml) | grams dissolved per 100ml of water: 6.7 × 10-4/20 ℃ |
Last Update：2024-04-10 22:29:15
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