Benzohydroxamic acid
- CAS No.
- 495-18-1
- Chemical Name:
- Benzohydroxamic acid
- Synonyms
- BHAM;NSC 3136;NSC 147248;benzohydroxamate;N-HYDROXYBENZAMIDE;Benzohydroxamsαure;n-hydroxy-benzamid;BENZOHYROXAMICACID;benzohydroxamicaci;BENZHYDROXAMIC ACID
- CBNumber:
- CB4764830
- Molecular Formula:
- C7H7NO2
- Molecular Weight:
- 137.14
- MDL Number:
- MFCD00002109
- MOL File:
- 495-18-1.mol
- MSDS File:
- SDS
| Melting point | 126-130 °C(lit.) |
|---|---|
| Boiling point | 251.96°C (rough estimate) |
| Density | 1.2528 (rough estimate) |
| refractive index | 1.5030 (estimate) |
| storage temp. | 2-8°C |
| solubility | Soluble in alcohol. Slightly soluble in ether. Insoluble in benzene. |
| form | Solid |
| pka | pK1: 8.89(0) (20°C) |
| color | Rhombic tablets |
| Water Solubility | 22 g/L (6 ºC) |
| BRN | 1907585 |
| Stability | Moisture and Temperature Sensitive |
| InChIKey | VDEUYMSGMPQMIK-UHFFFAOYSA-N |
| CAS DataBase Reference | 495-18-1(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| FDA UNII | K8YW73872D |
| NIST Chemistry Reference | Benzamide, n-hydroxy-(495-18-1) |
| EPA Substance Registry System | Benzohydroxamic acid (495-18-1) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS07,GHS08 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H315-H319-H335-H341 | |||||||||
| Precautionary statements | P201-P261-P305+P351+P338-P405-P501a-P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313 | |||||||||
| Hazard Codes | Xn | |||||||||
| Risk Statements | 68-40-20/21/22 | |||||||||
| Safety Statements | 45-36/37-36-22 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | DF9650000 | |||||||||
| TSCA | Yes | |||||||||
| HS Code | 29280090 | |||||||||
| Toxicity | LD orl-rat: >500 mg/kg NCNSA6 5,26,53 | |||||||||
| NFPA 704 |
|
Benzohydroxamic acid price More Price(31)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 412260 | Benzhydroxamic acid 99% | 495-18-1 | 5g | $76.6 | 2024-03-01 | Buy |
| TCI Chemical | B0061 | Benzohydroxamic Acid >98.0%(T) | 495-18-1 | 5g | $36 | 2024-03-01 | Buy |
| TCI Chemical | B0061 | Benzohydroxamic Acid >98.0%(T) | 495-18-1 | 25g | $143 | 2024-03-01 | Buy |
| Alfa Aesar | A10509 | Benzohydroxamic acid, 98% | 495-18-1 | 10g | $80.2 | 2024-03-01 | Buy |
| Alfa Aesar | A10509 | Benzohydroxamic acid, 98% | 495-18-1 | 25g | $166 | 2024-03-01 | Buy |
Benzohydroxamic acid Chemical Properties,Uses,Production
Chemical Properties
Crystalline Solid
Uses
Benzhydroxamic acid may be employed for the Pd-catalyzed synthesis of benzisoxazolones.
Uses
Benzhydroxamic acid is used as precursor in the synthesis of novel mono-anionic and di-anionic hydroxamato complexes by reacting with BiPh3 and Bi(O(t)Bu)3, which has anti-bacterial activity against helicobacter pylori. It is used in the photometric determination of trace amounts of vanadium in alloy steels by making mixed-ligand vanadium chelates with ammonium thiocyanate. It is also involved in the palladium catalyzed synthesis of benzisoxazolones.
Preparation
To a rapidly stirred suspension of 19.6 gm (0.35 mole) of powdered anhydrous potassium hydroxide in 120 ml of pyridine, maintained at 0-5°C, is a added a solution of 13.9 gm (0.2 mole) of hydroxylamine hydrochloride in 100 ml of pyridine.
While maintaining the reaction temperature at 0-5°C, 15 gm (0.1 mole) of ethyl benzoate is added. Vigorous stirring is continued at room temperature for 6 hr. Then the solids are filtered off. The solids are washed with cold water to remove inorganic coproducts. The remainder, recrystallized from aqueous ethanol, represents a 94% yield of potassium benzohydroxamate.
This salt is triturated with cold 0.01 TV hydrochloric acid. From this mixture, by the usual procedures, 12.5 gm (91% overall) of benzohydroxamic acid is isolated, m.p. 131°C (from aqueous alcohol).
Synthesis Reference(s)
Tetrahedron Letters, 33, p. 5055, 1992 DOI: 10.1016/S0040-4039(00)61187-5
General Description
Rhombic crystals or light beige solid.
Air & Water Reactions
Slightly soluble in water.
Reactivity Profile
Benzohydroxamic acid is an amide. Amides/imides react with azo and diazo compounds to generate toxic gases. Flammable gases are formed by the reaction of organic amides/imides with strong reducing agents. Amides are very weak bases (weaker than water). Imides are less basic yet and in fact react with strong bases to form salts. That is, they can react as acids. Mixing amides with dehydrating agents such as P2O5 or SOCl2 generates the corresponding nitrile. The combustion of these compounds generates mixed oxides of nitrogen (NOx).
Health Hazard
ACUTE/CHRONIC HAZARDS: When heated to decomposition Benzohydroxamic acid emits toxic fumes of nitrogen oxides.
Fire Hazard
Flash point data for Benzohydroxamic acid are not available; however, Benzohydroxamic acid is probably combustible.
Safety Profile
Moderately toxic by ingestion.Mutation data reported. When heated to decomposition itemits toxic fumes of NOx.
Benzohydroxamic acid Preparation Products And Raw materials
Raw materials
1of2
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Weifang Wehibest Supply Chain Co.,Ltd | +8613583620690 | hotspotbiotech@163.com | China | 926 | 58 |
| Hebei Mojin Biotechnology Co., Ltd | +8613288715578 | sales@hbmojin.com | China | 12456 | 58 |
| Hefei TNJ Chemical Industry Co.,Ltd. | +86-0551-65418679 +86-18949832763 | info@tnjchem.com | China | 2989 | 55 |
| Hubei Jusheng Technology Co.,Ltd. | 18871490254 | linda@hubeijusheng.com | CHINA | 28180 | 58 |
| Hebei Guanlang Biotechnology Co., Ltd. | +86-19930503282 | alice@crovellbio.com | China | 8823 | 58 |
| Shandong chuangyingchemical Co., Ltd. | 18853181302 | sale@chuangyingchem.com | CHINA | 5909 | 58 |
| CONIER CHEM AND PHARMA LIMITED | +8618523575427 | sales@conier.com | China | 47465 | 58 |
| career henan chemical co | +86-0371-86658258 15093356674; | factory@coreychem.com | China | 29826 | 58 |
| Zhengzhou Alfa Chemical Co.,Ltd | +8618530059196 | sale04@alfachem.cn | China | 12468 | 58 |
| Hebei Yanxi Chemical Co., Ltd. | +8617531190177 | peter@yan-xi.com | China | 5993 | 58 |
View Lastest Price from Benzohydroxamic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
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2023-11-13 | Benzohydroxamic acid
495-18-1
|
US $0.00 / KG | 1KG | 99% | 50000KG/month | Hebei Mojin Biotechnology Co., Ltd | |
 |
2023-09-13 | Benzohydroxamic acid
495-18-1
|
US $0.00 / kg | 1kg | 0.99 | 20tons | Hebei Yanxi Chemical Co., Ltd. | |
 |
2023-09-06 | Benzohydroxamic acid
495-18-1
|
US $0.00-0.00 / KG | 1KG | 99% | 500000kg | Hebei Guanlang Biotechnology Co., Ltd. |
-
- Benzohydroxamic acid
495-18-1
- US $0.00 / KG
- 99%
- Hebei Mojin Biotechnology Co., Ltd
-
- Benzohydroxamic acid
495-18-1
- US $0.00 / kg
- 0.99
- Hebei Yanxi Chemical Co., Ltd.
-
- Benzohydroxamic acid
495-18-1
- US $0.00-0.00 / KG
- 99%
- Hebei Guanlang Biotechnology Co., Ltd.