phosphate dodecahydrate
Sodium Phosphate Tribasic Dodecahydrate
CAS: 10101-89-0
Molecular Formula: H6NaO5P
phosphate dodecahydrate - Names and Identifiers
| Name | Sodium Phosphate Tribasic Dodecahydrate |
| Synonyms | TSP dodecahydrate TRISODIUM PHOSHATE phosphate dodecahydrate Sodium Phosphate 12-Water Sodium phorhoate tribaric Sodium phosphate dodecahydrate TRISODIUM PHOSPHATE TECH. GRADE Trisodium phosphate dodecahydrate DODECAHYDRATE TRISODIUM PHOSPHATE Trisodium phosphate, dodecahydrate TRISODIUM PHOSPHATE TECHNICAL GRADE Phosphoric acid, trisodium, 12-hydrate Sodium Phosphate Tribasic Dodecahydrate |
| CAS | 10101-89-0 |
| EINECS | 600-151-8 |
| InChI | InChI=1/H3O4P.12H2O/c1-5(2,3)4;;;;;;;;;;;;/h(H3,1,2,3,4);12*1H2/p-3 |
| InChIKey | ASTWEMOBIXQPPV-UHFFFAOYSA-K |
phosphate dodecahydrate - Physico-chemical Properties
| Molecular Formula | H6NaO5P |
| Molar Mass | 140.01 |
| Density | 1.62 g/mL at 25 °C |
| Melting Point | 75 °C |
| Boling Point | 158℃ at 760 mmHg |
| Water Solubility | 258 g/L (20 ºC) |
| Solubility | Soluble in water, insoluble in ethanol and carbon disulfide. |
| Appearance | White or colorless crystals |
| Specific Gravity | 1.62 |
| Color | White |
| Merck | 14,8662 |
| PH | 12 (10g/l, H2O, 20℃) |
| Storage Condition | Store at +5°C to +30°C. |
| Stability | Stable. Incompatible with strong acids. Keep dry. |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00149198 |
| Physical and Chemical Properties | Characteristics of colorless or white crystals. melting point 73.3~76.7 ℃ (decomposition) relative density 1.62(20 ℃) solubility soluble in water, its aqueous solution is strongly alkaline; Insoluble in ethanol, carbon disulfide. |
| Use | Used as water softener, boiler cleaner, metal rust inhibitor and used in paper, leather, photography, etc. |
phosphate dodecahydrate - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | R34 - Causes burns R35 - Causes severe burns R36/38 - Irritating to eyes and skin. |
| 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.) S24/25 - Avoid contact with skin and eyes. |
| UN IDs | UN 3262 8/PG 3 |
| WGK Germany | 1 |
| RTECS | TC9575000 |
| TSCA | Yes |
| HS Code | 28352300 |
| Hazard Class | 8 |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 7400 mg/kg |
phosphate dodecahydrate - Upstream Downstream Industry
| Raw Materials | Sodium carbonate Phosphoric acid Sulfuric acid Sodium hydroxide Sodium carbonate |
| Downstream Products | Sodium Ligninsulfonate lignosulfonic acid, calcium salt |
phosphate dodecahydrate - Reference
| Reference Show more | 1. Hao Baocheng, Quan Xiaodi, Gao Xudong, et al. Study on the Stability of Sukang Jiedu Oral Solution [J]. Heilongjiang Animal Husbandry and Veterinary Medicine, 2016(12):167-170. |
phosphate dodecahydrate - Nature
Open Data Verified Data
trisodium phosphate dodecahydrate is a colorless octahedral cubic crystal with a relative density (20 ℃) of 1-62 and a melting point of 73. 40 ℃. Weathering in dry air. Soluble in water itself crystallization; Insoluble carbon disulfide, ethanol. The aqueous solution is strongly alkaline, and the pH of 1% solution is 12.5. When heated to 100 °c, 11 crystals of water are lost to become a monohydrate; At 212 °c, they become anhydrate.
Last Update：2024-01-02 23:10:35
phosphate dodecahydrate - Preparation Method
Open Data Verified Data
wet-process phosphoric acid is neutralized with sodium carbonate solution, and after completion of the reaction, filtered, evaporated, concentrated, crystallized, centrifuged, and dried to obtain a finished product. Alternatively, liquid caustic soda NaOH is added to the thermal phosphoric acid for neutralization reaction to produce trisodium phosphate. After cooling crystallization, centrifugal separation, drying to obtain trisodium phosphate.
Last Update：2022-01-01 08:53:23
phosphate dodecahydrate - Introduction
Soluble in water. The aqueous solution is acidic. It melts at about 75 ℃, loses 11 molecules of crystal water at 100 ℃, and is not completely dehydrated at 200 ℃. Melt in 3.5 parts of water and 1 part of boiling water, insoluble in ethanol. It is almost completely decomposed into disodium hydrogen phosphate and sodium hydroxide in the aqueous solution, which is strongly alkaline, and the pH of the 0.1% solution is 11.5. Slight toxicity, median lethal dose (rat, oral) 7.40 g/kg. It's corrosive. Solubility in water: 258G/L(20°C).
Last Update：2022-10-16 17:11:29
phosphate dodecahydrate - Safety
Open Data Verified Data
non-combustible. Trisodium phosphate powder is irritating to the mucous membranes of the eyes and the upper respiratory tract, and can cause dermatitis and eczema. Staff should be protected, if contact with the skin, should immediately rinse with water. Should be stored in a cool, dry place. During storage and transportation, rain and sunlight should be prevented.
Last Update：2022-01-01 08:53:23
phosphate dodecahydrate - Reference Information
| pH indicator color change ph range | 13 at 190g/l at 25 c |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| overview | trisodium phosphate is also called sodium phosphate and sodium orthophosphate. Colorless crystals. Relative density 1.62. Melting point 73.4 ℃. Easy to weathering. Heat to 100 ℃ and lose crystal water to form anhydrous substance. Relative density 2.537 (17.5/ 4 ℃). Melting point 1340 ℃. Dissolved in water, almost completely decomposed into disodium hydrogen phosphate and sodium hydroxide in the aqueous solution. The aqueous solution is alkaline and has a certain erosive effect on the skin. It is insoluble in ethanol and carbon disulfide. trisodium phosphate is often used as a water softener and boiler cleaner in textile, printing and dyeing, papermaking, power generation, chemical industry and other industries. It is also used as a metal rust remover, reactive dye fixing agent, iron and steel container phosphating agent, sugar juice purifier, rubber milk coagulant and penicillin and other pharmaceutical culture agents. Trisodium phosphate can also be used as a food additive, which is a food moisture retention agent allowed by GB2760-1996 regulations in China. It can also be used as a development accelerator and is often used in oil-soluble color developer. |
| identification method | trisodium phosphate aqueous solution (1 20) should react with sodium salt and phosphate. 1. Sodium salt reaction: see sodium hydroxide identification method. 2. Phosphate reaction: see the identification method of calcium dihydrogen phosphate. |
| food additive usage | quality improver, emulsifier and chelating agent. scope of use and usage: China's "hygienic standard for the use of food additives" (GB 2760-1996) stipulates that it can be used for canned food, fruit juice drinks, dairy products and vegetable protein drinks with a maximum dosage of 0.5 g/kg; For western ham and meat products, the maximum dosage is 3.0 g/kg; For cheese, the maximum dosage is 5.0 g/kg; Beverage, the maximum dosage is 1.5 g/kg. when using compound phosphate, our country stipulates that canned food and meat products shall not exceed 1.0 g/kg based on the total amount of phosphate; Condensed milk shall not exceed 0.50 g/kg. When sodium pyrophosphate, sodium tripolyphosphate and trisodium phosphate are used in combination, it shall not exceed 5 g/kg in terms of phosphate. For western cooking smoked ham, it shall not exceed 5 g/kg; For western ham, it can be added more appropriately, but in terms of phosphate, it shall not exceed 8 g/kg. |
| toxicity | Adl 0~70 mg/kg (in terms of phosphorus). LD50>2 g/kg (groundhog, via mouth). Edible sodium phosphate is used in canned food, fruit juice beverage, dairy products, soybean milk, etc., and its maximum usage is 0.5 g/kg. |
| use | used as water softener and detergent, boiler descaling agent, metal rust inhibitor, printing and dyeing fixing agent, enamel production flux and decoloring agent, tanning degreasing agent and degumming agent, etc. used as analytical reagent, water softener and metal cleaning agent used as water softener, boiler cleaner, metal rust inhibitor, and used in papermaking, leather photography, etc. used as water softener and detergent in chemical, textile, printing and dyeing, papermaking, power generation and other industries, boiler scale inhibitor, water softener in paper dyeing, pH buffer for adhesive for producing waxed paper, fixing agent for printing and dyeing, mercerizing enhancer for fabric, anti-brittleness agent for thread making. The metallurgical industry is used as a chemical degreasing, decontamination, metal corrosion inhibitor or rust inhibitor. The enamel industry is used as a flux and decolorant. Used as hide degreasing agent and degumming agent in the leather industry. Used as an excellent accelerator in photographic development solution. Dental cleaner and detergent for bottles. Coagulation for rubber milk. Sugar juice purifier. Water softener, photographic developer, detergent. Phosphate plays a role in quality improvement in food processing. For example, it has the functions of maintaining the water holding capacity of meat and increasing the binding force in meat products to reduce the loss of nutrients in meat and preserve the tenderness of meat. It is also used as emulsifier, nutritional supplement and quality improver in food processing. It is the raw material for preparing edible alkaline water for noodles, and is also used for sugar refining and α-starch manufacturing. It is also used as a detergent for food bottles, cans, etc. |
| production method | neutralization method dilutes food grade phosphoric acid to a certain concentration with non-ionized water, then adds it to a stirred reactor, slowly adds food grade caustic soda solution under stirring for neutralization reaction, adjusts the Na/P) ratio to 3.24~3.26, and then adds decolorant, heavy metal remover and arsenic remover for solution purification, then filter to remove impurities, the filtrate is cooled and crystallized, centrifuged and dried to produce edible trisodium phosphate dodecahydrate. Its H3PO4 + 3NaOH → Na3PO4 + 3H2O Extraction phosphoric acid method The phosphate rock powder is reacted with sulfuric acid to obtain the extraction phosphoric acid. Add an appropriate amount of washing water, dilute to make the phosphorus pentoxide content in the solution 18% ~ 20%, heat to 85 ℃, and slowly add 30~35 under stirring. B6 sodium carbonate solution was neutralized to make pH = 8~8.4. Add trisodium phosphate mother liquor to make the phosphorus pentoxide content in the solution less than 12%. Heat preservation for 15~20min, filtration, evaporation and concentration to 24~25 ° Bé. Add liquid caustic soda to make the sodium storage ratio reach 3.24~3.26. After cooling crystallization, centrifugal separation and air drying, the finished product of trisodium phosphate dodecahydrate is prepared. Its Ca5F(PO4)3+5H2SO4 + 10H2O → 3H3PO4+5 CaSO4?2H2O + HFH3PO4 + Na2CO3 → Na2HPO4 + H2O + CO2 = Na2HPO4 + NaOH →-Na3PO4 + H2O thermal phosphoric acid method adds thermal phosphoric acid to the reactor, slowly adds liquid caustic soda under stirring for neutralization reaction to generate trisodium phosphate, which is cooled and crystallized, centrifuged and dried to produce trisodium phosphate dodecahydrate finished product. Its H3PO4 + 3NaOH → Na3PO4 + 3H2O |
Last Update：2024-04-09 20:49:11
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Raw Materials for phosphate dodecahydrate
Downstream Products for phosphate dodecahydrate