metaphosphoric acid
metaphosphoric acid
CAS: 10343-62-1;37267-86-0
Molecular Formula: HO3P
metaphosphoric acid - Names and Identifiers
| Name | metaphosphoric acid |
| Synonyms | Phosphenic acid M-PHOSPHORIC ACID metaphosphoric acid METAPHOSPHORIC ACID Meta-phosphoric acid Phosphoric acid meta PHOSPHORIC ACID, META Metaphosphoric acid (HPO3) Phosphorus hydoxide dioxide VITREOUS SODIUM ACID METAPHOSPHATE META-PHOSPHORIC ACID PIECES FOR ANALYSIS |
| CAS | 10343-62-1 37267-86-0 |
| EINECS | 233-750-4 |
| InChI | InChI=1/C8H16O4.H3O4P/c1-5-9-6(2)11-8(4)12-7(3)10-5;1-5(2,3)4/h5-8H,1-4H3;(H3,1,2,3,4) |
metaphosphoric acid - Physico-chemical Properties
| Molecular Formula | HO3P |
| Molar Mass | 79.98 |
| Melting Point | 21℃ |
| Boling Point | 158℃ |
| Water Solubility | dissolves very slowly in cold H2O to form H3PO4, formation of H3PO4 accelerated by boiling; soluble alcohol [MER06] |
| Solubility | Solubility in water: Soluble Solubility in other solvents: Slowly forming the ortho-acid |
| Appearance | Colorless solid |
| Color | Clear |
| Storage Condition | Room Temprature |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00011351 |
metaphosphoric acid - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | 34 - Causes burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 3260 8/PG 3 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 3 |
metaphosphoric acid - Reference
| Reference Show more | 1. Zhang Meng, Cao Tingting, Cheng Ziwei, Jin Wenyuan, Jin Peng, Zheng Yonghua. Effects of High Humidity Storage on Chilling Injury and Antioxidant Activity of Green Pepper Fruits [J]. Food Science, 2021,42(03):243-250. |
metaphosphoric acid - Introduction
Metaphosphoric acid (H4P2O7), also known as pyrophosphoric acid, is an inorganic compound. The following is a description of the nature, use, preparation and safety information of metaphosphoric acid:
Nature:
1. Appearance: metaphosphoric acid is a colorless crystalline solid, the common form is anhydrous and monohydrate.
2. solubility: metaphosphoric acid soluble in water, acidic solution.
3. chemical properties: metaphosphoric acid can be hydrolyzed into orthophosphoric acid, which has strong oxidation and can react with metal to produce phosphate.
Use:
1. as a chemical reagent: metaphosphoric acid is widely used in chemical analysis and synthesis reactions in the laboratory, for the preparation of phosphate, buffer solution, metal cleaning agent, etc.
2. as a fertilizer: metaphosphoric acid is used as an important raw material for phosphate fertilizer in agriculture to supplement phosphorus in the soil and promote plant growth, flowering and fruiting.
Preparation Method:
The metaphosphoric acid can be prepared by reacting orthophosphoric acid with a phosphoric acid diester. First, orthophosphoric acid is dissolved in water and then transesterified with a phosphoric acid diester (e. g., trimethyl phosphoric acid diester) to produce metaphosphoric acid.
Safety Information:
1. metaphosphoric acid has a certain corrosive, avoid contact with skin and eyes, avoid inhalation of its dust or solution.
2. Wear protective gloves, safety glasses and laboratory coat during operation, and keep good ventilation.
3. metaphosphoric acid should be stored in a dry, sealed container, separated from combustibles and easy oxides.
4. When dealing with waste liquid of metaphosphoric acid, environmental regulations should be followed to avoid pollution to the environment and dispose of waste liquid correctly.
Nature:
1. Appearance: metaphosphoric acid is a colorless crystalline solid, the common form is anhydrous and monohydrate.
2. solubility: metaphosphoric acid soluble in water, acidic solution.
3. chemical properties: metaphosphoric acid can be hydrolyzed into orthophosphoric acid, which has strong oxidation and can react with metal to produce phosphate.
Use:
1. as a chemical reagent: metaphosphoric acid is widely used in chemical analysis and synthesis reactions in the laboratory, for the preparation of phosphate, buffer solution, metal cleaning agent, etc.
2. as a fertilizer: metaphosphoric acid is used as an important raw material for phosphate fertilizer in agriculture to supplement phosphorus in the soil and promote plant growth, flowering and fruiting.
Preparation Method:
The metaphosphoric acid can be prepared by reacting orthophosphoric acid with a phosphoric acid diester. First, orthophosphoric acid is dissolved in water and then transesterified with a phosphoric acid diester (e. g., trimethyl phosphoric acid diester) to produce metaphosphoric acid.
Safety Information:
1. metaphosphoric acid has a certain corrosive, avoid contact with skin and eyes, avoid inhalation of its dust or solution.
2. Wear protective gloves, safety glasses and laboratory coat during operation, and keep good ventilation.
3. metaphosphoric acid should be stored in a dry, sealed container, separated from combustibles and easy oxides.
4. When dealing with waste liquid of metaphosphoric acid, environmental regulations should be followed to avoid pollution to the environment and dispose of waste liquid correctly.
Last Update：2024-04-09 21:01:54
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