KBH
KBH - Names and Identifiers
| Name | Potassium borohydride |
| Synonyms | KBH K[BH4] Kaliumborhydrid Potassium borohydride borohydruredepotassium Kaliumtetrahydridoborat Borohydrure de potassium potassium boron(-1) anion potassium tetrahydroborate Potassium tetrahydridoborate Borate(1-),tetrahydro-,potassium Borate(1-), tetrahydro-, potassium |
| CAS | 13762-51-1 |
| EINECS | 237-360-5 |
| InChI | InChI=1/BH5.K/h1H5;/q-1;+1 |
| InChIKey | ICRGAIPBTSPUEX-UHFFFAOYSA-N |
KBH - Physico-chemical Properties
| Molecular Formula | BH4K |
| Molar Mass | 53.94 |
| Density | 1.18 g/mL at 25 °C (lit.) |
| Melting Point | 500 °C (dec.) (lit.) |
| Water Solubility | 190 g/L (25 ºC) |
| Appearance | Powder |
| Specific Gravity | 1.178 |
| Color | White |
| Merck | 14,7616 |
| Storage Condition | water-free area |
| Sensitive | Moisture Sensitive |
| Refractive Index | 1.494 |
| Physical and Chemical Properties | White crystals or slightly gray-yellow crystalline powder. Density 1.178g/cm3. Slightly hygroscopic in air, unstable. Dissolve in water, slowly release hydrogen. Soluble in liquid ammonia, amines, methanol-soluble, ethanol, insoluble in ether, benzene, Tetrahydrofuran, methyl ether and other hydrocarbons. It can be decomposed by acid to release hydrogen. Stable in base. Decomposition at about 500 °c in vacuum. |
| Use | It is used as a reducing agent for aldehydes, ketones and acid chlorides, etc. It is used as a reducing agent for Analytical Chemistry, pesticides, paper industry and other fine chemical products, and can also be used for the treatment of mercury-containing wastewater, etc. |
KBH - Upstream Downstream Industry
| Raw Materials | Methyl alcohol Orthoboric acid Hydrogen |
| Downstream Products | Diniconazole Paclobutrazol Bromoadiolone Gliclazide Labetalol bromohexine hydrochloride trimebutine maleate |
KBH - Nature
Open Data Verified Data
White loose powder or crystals. The relative density was 1. 178. Melting point 585 ° C, about 500 ° C in vacuum began to decompose, stable in air, not hygroscopic. Potassium borohydride is readily soluble in water, and hydrogen is completely released when the aqueous solution is heated to 1000 °c. Soluble in liquid ammonia, slightly soluble in methanol and ethanol, almost insoluble in ether, benzene, Tetrahydrofuran, methyl ether and other hydrocarbons. Stable in alkaline environment, when inorganic acid decomposition and release of hydrogen.
Last Update：2025-06-10 22:55:16
KBH - Preparation Method
Open Data Verified Data
Sodium Borohydride method: firstly, Sodium Borohydride alkaline solution (I. E., the hydrolysis solution obtained from the hydrolysis process) is prepared by sodium borohydride methyl borate method, and then it is metered into a crystallization tank and heated to 60 ° C under stirring, potassium hydroxide was added and incubated for 1H; Followed by cooling and rest for 12H; After centrifugation, the crystals were washed with ethanol and dried at 80 ° C. For 16h to obtain a finished potassium borohydride product.
Last Update：2022-01-01 10:58:51
KBH - Application
Open Data Verified Data
for the reduction of organic selective groups; Used as a reducing agent for aldehydes, ketones and acid chlorides, can reduce the organic functional groups RCHO, RCOR, RCOCI to RCH2, CHR2, HOHR, RCH2 0H; Also used in analytical chemistry, paper industry, mercury containing wastewater treatment and synthesis of cellulose potassium.
Last Update：2025-08-19 16:24:40
KBH - Safety
Open Data Verified Data
packed in an iron drum lined with a polyethylene bag or a kraft paper bag. 5kg or 10kg net per barrel. One wooden case in each of two iron barrels. Should be stored in a cool, dry warehouse. Avoid breaking up and absorbing moisture. Do not store and transport with inorganic acid, Isolation heat source and fire and flammable articles. When there is a fire, it can be suppressed by sand and carbon dioxide fire. It belongs to Class II water burning articles. Risk code: GB Class 4.3 43045. UN N0.1870; IMDG code 4.3, Class 3. See sodium borohydride.
Last Update：2025-06-10 22:55:16
KBH - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| traits | colorless or white crystals |
| Use | Potassium borohydride is an alkali metal rehydride, which is a practical and powerful reducing agent. used for the reduction reaction of organic selective groups; used as a reducing agent for aldehydes, ketones and acid chlorides, can reduce the organic functional groups RCHO, RCOR, RCOCl to RCH2, CHR2, HOHR, RCH2OH, etc.; also used in analytical chemistry, paper industry, mercury-containing wastewater treatment and synthesis of cellulose potassium. Used in pharmaceuticals, cellulose improvers, pulp bleaching, etc. Used as a reducing agent for aldehydes, ketones and acid chlorides. Reducing agents of aldehydes, ketones and acyl chlorides, reduction of carbonyl and peroxy compounds, refining and removal of color, smell and oxidation matrix in organic chemical products, pollution control and recovery of precious metals in photographic and metal finishing industries, manufacture of drugs and fine chemicals and preparation of catalysts. Solubility (g/100g): water 19(25 ℃), liquid ammonia 20(25 ℃), ethylenediamine 3.9(75 ℃), methanol 0.7(20 ℃), dimethylformamide 15(20 ℃). Used as a reducing agent for aldehydes, ketones and acyl chlorides, used in pharmaceuticals, cellulose improvement, pulp bleaching, etc. |
| toxicity | see sodium borohydride. |
| production method | sodium borohydride method first produces sodium borohydride alkaline solution (I .e. hydrolysate obtained in hydrolysis process) by sodium hydride methyl ester method, then metered into a crystallization tank, heated to 60 ℃ under stirring, and added potassium hydroxide for 1h; Then cool and stand still for 12h; After centrifugal separation, wash the crystals with ethanol, dry at 80 ℃ for 16 h to produce potassium borohydride finished product. Its H3BO3 3CH3OH → B(OCH3)3 3H2ONa H2 → 2NaH4NaH B(OCH3)3 → NaBH4 3CH3ONaNaBH4 KOH → KBH4 NaOH |
Last Update：2024-04-10 22:29:15
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