140-22-7
sym-Diphenylcarbazide
CAS: 140-22-7
Molecular Formula: C13H14N4O
140-22-7 - Names and Identifiers
| Name | sym-Diphenylcarbazide |
| Synonyms | Diphenylcarbazide DIPHENYLCARBAZIDE TIMTEC-BB SBB008713 1,5-Diphenylcarbazid sym-Diphenylcarbazide Diphenylcarbazide p.a. 2,2'-diphenylcarbazide 1,5-Diphenylcabohydrazide 1,5-Diphenylcarbohydrazine 1,5-diphenyl-carbohydrazid 1,5-Diphenylcarbohydrazide |
| CAS | 140-22-7 |
| EINECS | 205-403-7 |
| InChI | InChI=1/C13H14N4O/c18-13(16-14-11-7-3-1-4-8-11)17-15-12-9-5-2-6-10-12/h1-10,14-15H,(H2,16,17,18) |
140-22-7 - Physico-chemical Properties
| Molecular Formula | C13H14N4O |
| Molar Mass | 242.28 |
| Density | 1.31 g/cm3 |
| Melting Point | 170-175°C(lit.) |
| Boling Point | 385.1°C (rough estimate) |
| Water Solubility | Soluble in glacial acetic acid, alcohol and acetone. Slightly soluble in water. |
| Solubility | aqueous acetone: passes test |
| Appearance | Powder or Flakes |
| Color | White to cream |
| Odor | Odorless |
| Merck | 14,3321 |
| BRN | 752039 |
| pKa | 9.98±0.43(Predicted) |
| Storage Condition | 2-8°C |
| Stability | Stable. Light sensitive. Incompatible with strong oxidizing agents. |
| Sensitive | Light Sensitive |
| Refractive Index | 1.6120 (estimate) |
| MDL | MFCD00003013 |
| Physical and Chemical Properties | White crystalline powder. Melting Point 175-175.5 °c. Soluble in hot alcohol, acetone and acetic acid, very slightly soluble in water. Gradient red in air. |
| Use | Used as analytical reagents, redox indicators, adsorption indicators, complexing indicators and chromatographic analysis reagents |
140-22-7 - 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. |
| WGK Germany | 3 |
| RTECS | FF2750000 |
| FLUKA BRAND F CODES | 8-10-23 |
| TSCA | Yes |
| HS Code | 29280090 |
| Hazard Class | IRRITANT |
140-22-7 - Reference
| Reference Show more | 1. [IF=3.591] Congcong Yan et al."Improved photoremoval performance of boron carbon nitride–pyromellitic dianhydride composite toward tetracycline and Cr(VI) by itself to change the solution pH."New J Chem. 2020 Jul;44(26):11105-11124 |
140-22-7 - Introduction
As an indicator when titrating iron. Colorimetric determination of chromium, mercury and lead, detection of cadmium, mercury, magnesium, aldehydes and soil root alkali. Chlorination reduction indicator for determination of dichromate. Adsorptive indicators for the determination of chloride and cyanide by the mercury method. (Used as a chromogenic agent for the determination of chromium by spectrophotometry and a chromogenic agent for the determination of Cu2, Fe3, Hg2, etc. It is also used as an indicator for redox, adsorption and titration.)
Last Update：2022-10-16 17:13:50
140-22-7 - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | used for colorimetric determination of chromium, mercury, lead, redox indicator for determination of dichromate, adsorption indicator for determination of chloride and cyanide by mercury method, verification of cadmium, copper, iron, molybdenum and vanadium, etc. In RoHS test, use the principle of color development to detect whether the content of hexavalent chromium exceeds the standard. When titrating iron, it is used as an indicator. Colorimetric determination of chromium, mercury and lead, detection of cadmium, mercury, magnesium, aldehydes and soil root alkali. Chlorination reduction indicator for determination of dichromate. Adsorptive indicators for the determination of chloride and cyanide by the mercury method. (Used as a chromogenic agent for the determination of chromium by spectrophotometry and a chromogenic agent for the determination of Cu2, Fe3, Hg2, etc. It is also used as an indicator for redox, adsorption and combined titration.) Used as analytical reagent, redox indicator, adsorption indicator, complexation indicator and chromatographic analysis reagent |
| Production method | It is obtained by the reaction of phenylhydrazine and urea. Add phenylhydrazine and urea to xylene, reflux reaction for 32 hours, leave overnight, and filter out the crude product. Then dissolve with a mixed acid solvent of ethanol and a little acetic acid, quickly cool and crystallize, filter and soak again with ethanol, and filter to dry the finished product. |
Last Update：2024-04-09 21:01:54
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