Disodium Phosphate
Sodium hydrogenphosphate dihydrate
CAS: 10028-24-7
Molecular Formula: 2Na.HO4P.2H2O
Disodium Phosphate - Names and Identifiers
| Name | Sodium hydrogenphosphate dihydrate |
| Synonyms | DSP DSPA DISODIUM PHOSHATE DISODIUM PHOSPHATE DIBASIC SODIUM PHOSPHATE DISODIUM HYDROGEN PHOSPHATE DINATRII PHOSPHAS ANHYDRICUS SEC-SODIUM PHOSPHATE dihydrate SODIUM HYDROGENHOSHATE dihydrate Sodium hydrogenphosphate dihydrate SODIUM PHOSPHATE, DIBASIC dihydrate SECONDARY SODIUM PHOSPHATE dihydrate Sodium phosphate, dibasic, dihydrate phosphoricacid,disodiumsalt,dihydrate disodium hydrogen phosphate dihydrate MONOHYDROGEN SODIUM PHOSPHATE dihydrate SODIUM MONOHYDROGEN PHOSPHATE dihydrate DI-SODIUM HYDROGEN ORTHOPHOSPHATE DIBASIC |
| CAS | 10028-24-7 |
| EINECS | 600-053-5 |
| InChI | InChI=1/2Na.H3O4P.2H2O/c;;1-5(2,3)4;;/h;;(H3,1,2,3,4);2*1H2/q2*+1;;;/p-2 |
| InChIKey | KDQPSPMLNJTZAL-UHFFFAOYSA-L |
Disodium Phosphate - Physico-chemical Properties
| Molecular Formula | 2Na.HO4P.2H2O |
| Molar Mass | 177.99 |
| Density | 1.064g/mLat 20°C |
| Melting Point | 92,5°C |
| Boling Point | 158°C at 760 mmHg |
| Water Solubility | Soluble in water |
| Solubility | H2O: 0.5M at20°C, clear, colorless |
| Vapor Presure | 1.41mmHg at 25°C |
| Vapor Density | 4.9 (vs air) |
| Appearance | White solid |
| Color | White |
| Odor | Odorless |
| Maximum wavelength(λmax) | ['λ: 260 nm Amax: 0.03', , 'λ: 280 nm Amax: 0.03'] |
| PH | 8.9-9.2 (25℃, 0.5M in H2O) |
| Storage Condition | Store at +5°C to +30°C. |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| MDL | MFCD00149182 |
| Physical and Chemical Properties | Vapor Density: 4.9 (vs air) solubility: H2O: 0.5 M at 20 ℃, clear, colorless WGK Germany:3 RTECS:WC4500000 |
Disodium Phosphate - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S24/25 - Avoid contact with skin and eyes. S22 - Do not breathe dust. |
| UN IDs | UN 3077 9 / PGIII |
| WGK Germany | 3 |
| RTECS | WC4500000 |
| FLUKA BRAND F CODES | 3 |
| HS Code | 28352200 |
| Toxicity | LD50 orally in Rabbit: > 2000 mg/kg |
Disodium Phosphate - Nature
Open Data Verified Data
white crystalline powder. Soluble in water, insoluble in alcohol. Easy to absorb moisture.
Last Update：2024-01-02 23:10:35
Disodium Phosphate - Preparation Method
Open Data Verified Data
phosphoric acid neutralization method. Adding soda ash into the neutralization reactor containing water, slowly adding 20% ~ 32% wet-process phosphoric acid under stirring to carry out neutralization reaction, so that the pH of the neutralization solution is 6.5 ~ 7.O, the residue (mainly iron phosphate, aluminum phosphate, etc.) was removed, industrial phosphoric acid was added to the filtrate to adjust pH -4.2 to 4.4, and then concentrated by evaporation to a relative density of 1. 50~1. 56(48 ~ 52oBe), into the cooling crystallizer cooling to 25~28 deg C precipitation crystallization, after centrifugal separation, drying, prepare disodium hydrogen phosphate dihydrate product.
Last Update：2022-01-01 09:04:36
Disodium Phosphate - Introduction
Solubility in water: 93g/L(20°C)
Last Update：2022-10-16 17:11:22
Disodium Phosphate - Use
Open Data Verified Data
- the pharmaceutical industry is used to make excitable tablets and fruit salts.
- It is used as a boiler water softener, a weighting agent for tanning leather and fabrics, a flame retardant for wood and paper, an glaze and a flux. Mordant for dyeing, used in the printing and dyeing industry as a stabilizer for hydrogen peroxide bleaching. It is a raw material for the manufacture of sodium pyrophosphate and other phosphates. It is also the culture agent of monosodium glutamate, erythromycin, penicillin, streptomycin and sewage biochemical treatment products. It not only has the use of sodium hydrogen phosphate dihydrate, but also can prevent the caking during transportation and storage.
Last Update：2022-01-01 09:04:36
Disodium Phosphate - Safety
Open Data Verified Data
woodchuck oral LDso: greater than 2g/kg. Should be stored in a cool, ventilated, dry warehouse. It is not appropriate to pile up the open-air cargo yard. They shall not be stored and transported together with damp articles, acids and toxic substances. During the transport process to prevent rain and sun exposure, moisture and weathering. When loading and unloading should be handled with light, to prevent the package rupture. Packed in polypropylene woven bags lined with polyethylene plastic bags, each with a net weight of 50kg. Fire, can use water, sand, all kinds of fire extinguishing.
Last Update：2022-01-01 09:04:37
Disodium Phosphate - Reference Information
| pH indicator color change ph range | 9.1 |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | used as boiler water softener, used for tanning and fabric weightener, flame retardant for wood and paper, glaze and flux. Mordant for dyeing, used as a stabilizer for hydrogen peroxide bleaching in the printing and dyeing industry. It is the raw material for the manufacture of sodium pyrophosphate and other phosphates. It is also a culture agent for monosodium glutamate, erythromycin, penicillin, streptomycin and sewage biochemical treatment products. It not only has the use of disodium hydrogen phosphate didecahydrate, but also prevents caking during transportation and storage. |
| production method | phosphoric acid neutralization method: soda ash is added to a neutralization reactor filled with water, and 20% ~ 32% wet phosphoric acid is slowly added under stirring to carry out neutralization reaction, so that the neutralization liquid Ph = 6.5~7.0 is filtered to remove residues (mainly iron phosphate, aluminum phosphate, etc.), when industrial phosphoric acid is added to the filtrate to adjust Ph = 4.2~4.4, and then evaporated and concentrated to 48~52 ° Bé, it is sent into a cooling crystallizer to cool to 25~28 ℃ to precipitate crystallization, and is centrifuged and dried to obtain a finished product of disodium hydrogen phosphate dihydrate. Its H3PO4 + Na2CO3 → Na2CO3 + H2O + CO2 ↑ |
Last Update：2024-04-09 20:52:54
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View History
Disodium Phosphate
Benzoic acid, 4-[(7-ethyl-3-formyl-1H-indol-1-yl)methyl]-, methyl ester (9CI)
非布索坦仲丁氧基酸
阿扎那韦中间体杂质3
6-硝基-2-吡啶甲酸
1096538-01-0
2-Hydroxybutanedioic acid diammonium salt
ZINCON FOR THE PHOTOMETRIC DETERMINATION
1-(4-溴-2-噻吩基)乙酮
吡拉西坦(脑复康)
Benzoic acid, 4-[(7-ethyl-3-formyl-1H-indol-1-yl)methyl]-, methyl ester (9CI)
非布索坦仲丁氧基酸
阿扎那韦中间体杂质3
6-硝基-2-吡啶甲酸
1096538-01-0
2-Hydroxybutanedioic acid diammonium salt
ZINCON FOR THE PHOTOMETRIC DETERMINATION
1-(4-溴-2-噻吩基)乙酮
吡拉西坦(脑复康)