Sodium Hydrogenfluoride, Granule
sodium hydrogenfluoride
CAS: 1333-83-1;51273-71-3
Molecular Formula: F2HNa
Sodium Hydrogenfluoride, Granule - Names and Identifiers
Sodium Hydrogenfluoride, Granule - Physico-chemical Properties
| Molecular Formula | F2HNa |
| Molar Mass | 61.99 |
| Density | 2.08 |
| Melting Point | >68°C (dec.) |
| Boling Point | 270℃[at 101 325 Pa] |
| Water Solubility | g/100g solution in H2O: 3.7 (20°C), 16.4 (80°C) [KIR78] |
| Vapor Presure | 0.01Pa at 20℃ |
| Appearance | pellets |
| Merck | 13,8656 |
| Physical and Chemical Properties | Properties of colorless or white sand-like crystalline powder. There is a strong sour taste. relative density 2.08 solubility soluble in water, insoluble in alcohol. |
| Use | Used as food and anatomical specimen preservation agent, rust removal agent, preservative, also used for etching glass, tin plate manufacturing, textile processing, leather insect |
Sodium Hydrogenfluoride, Granule - Risk and Safety
| Risk Codes | R25 - Toxic if swallowed R34 - Causes burns |
| Safety Description | S22 - Do not breathe dust. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37 - Wear suitable gloves. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 2439 8/PG 2 |
| WGK Germany | 1 |
| RTECS | WB0350010 |
| Hazard Class | 8 |
| Packing Group | II |
Sodium Hydrogenfluoride, Granule - Upstream Downstream Industry
Sodium Hydrogenfluoride, Granule - Nature
Open Data Verified Data
colorless or white sand-like crystalline powder. There is a strong sour taste. The relative density was 2. 08. Soluble in water, insoluble in alcohol. Water is absorbed in moist air and hydrogen fluoride is evolved. Heating to 160 °c is decomposed into sodium fluoride and hydrogen fluoride. At high temperatures, aluminum or aluminum alloys have an anti-corrosion effect on sodium fluoride. Aqueous solutions can corrode glass. Toxic.
Last Update：2024-01-02 23:10:35
Sodium Hydrogenfluoride, Granule - Preparation Method
Open Data Verified Data
neutralization method: in a plastic reactor, 40% hydrofluoric acid was metered in, and the apparatus was cooled with ice or cold water externally to maintain the reaction temperature at 5 ° C. Or lower. Under stirring, the filtered saturated soda ash solution was slowly added in a small stream and neutralized until the Congo red test paper was just red. Then cold
However, vacuum suction filtration, washing the crystals with a very small amount of water to remove the free acid, followed by centrifugal separation, drying at 80 ℃, crushing, prepared sodium fluoride products.
Last Update：2022-01-01 11:01:17
Sodium Hydrogenfluoride, Granule - Use
Open Data Verified Data
used as food protectant, preservative and preservative for animal specimens and anatomical specimens. It is also used for etching glass, tin plate manufacturing, textile processing, removal of rust, leather anti-insect and tinplate production. The mixture with potassium hydrogen fluoride may be used as a solder for the metal. It can also be used for the production of anhydrous hydrogen fluoride.
Last Update：2022-01-01 11:01:16
Sodium Hydrogenfluoride, Granule - Safety
Open Data Verified Data
This product is toxic. Inhalation of dust can severely irritate the respiratory organs; Contact with the skin can cause burns. Operators must wear necessary protective equipment to prevent inhalation of dust or contact with the skin. Packed in woven or hemp bags lined with polyethylene plastic bags, each with a net weight of 50kg. There should be a marked "toxic product" on the package. It is an inorganic drug. Risk code: GB 8.3 class 83003. UN N0.2439; IMDG CODE P. 8223, category 8.3. Should be stored in a ventilated, dry warehouse. Take precautions against humidity. Cannot be stored with sulfuric acid and edible products
Mixed.
Last Update：2022-01-01 11:01:18
Sodium Hydrogenfluoride, Granule - Reference Information
| LogP | 1.26 at 20℃ |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | sodium hydrogen fluoride is white crystalline powder, soluble in water, acidic in aqueous solution, and can corrode glass. Heat to decompose into sodium fluoride and hydrogen fluoride. It is used as a preservative, food preservation agent, and also used for etching glass, tin plate manufacturing, fabric treatment, rust removal, etc. |
| preparation method | at present, the preparation method of sodium hydrogen fluoride is mostly to add hydrofluoric acid solution in the reactor, and then add a theoretical amount of sodium carbonate solution under stirring to obtain sodium hydrogen fluoride slurry, and then filter and dry to obtain sodium hydrogen fluoride. |
| toxicity | this product is toxic. Sucking dust can severely irritate the respiratory organs; contact with the skin can cause burns. Operators must wear necessary protective equipment to prevent inhalation of dust or contact with skin. |
| use | used as preservative, flux, etchant for carved glass and animal specimen protection agent used as food protection agent, animal specimen and anatomical specimen preservation agent and preservative. It is also used for etching glass, tin plate manufacturing, textile processing, rust removal, leather insect prevention and tinplate production. Mixed with potassium hydrogen fluoride can be used as a welding agent for metals. It can also be used to produce anhydrous hydrogen fluoride. used as food and anatomical specimen preservation agent, rust removal agent, preservative, also used for etching glass, tin plate manufacturing, textile processing, leather insect prevention, etc. used as food protection agent, animal specimen and anatomical specimen preservation agent and preservative. It is also used for etching glass, tin plate manufacturing, textile treatment, rust removal, leather insect prevention and tinplate production. The mixture of sodium fluoride and potassium fluoride can be used as a metal welding agent. It can also be used to produce anhydrous hydrogen fluoride. |
| production method | neutralization method In a plastic reactor, 40% hydrofluoric acid is measured and cooled outside the reactor with ice or cold water to maintain the reaction temperature below 5 ℃. Under stirring, slowly add the filtered saturated soda ash solution in a trickle, and neutralize until the Congo red test paper is just red. Then cooling, vacuum suction filtration, with a very small amount of water to wash the crystal to remove the free acid, and then centrifugal separation, drying at 80 DEG C, pulverization, the preparation of sodium hydrogen fluoride products. Its 4HF Na2CO3 → 2NaHF2 H20 CO2 ↑ |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:43:14
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Raw Materials for Sodium Hydrogenfluoride, Granule