Fast Dark Blue Base R
3,3'-Dimethylbiphenyl-4,4'-diamine
CAS: 119-93-7
Molecular Formula: C14H14N2O2S
Fast Dark Blue Base R - Names and Identifiers
Fast Dark Blue Base R - Physico-chemical Properties
| Molecular Formula | C14H14N2O2S |
| Molar Mass | 274.34 |
| Density | 1.106g/cm3 |
| Melting Point | 125-132℃ |
| Boling Point | 361°C at 760 mmHg |
| Flash Point | 205.1°C |
| Water Solubility | Slightly soluble in water. |
| Vapor Presure | 2.14E-05mmHg at 25°C |
| Storage Condition | Room Temprature |
| Refractive Index | 1.638 |
| Physical and Chemical Properties | White to reddish crystalline or crystalline powder. melting point 125-132°C boiling point 300.5°C flash point 244°C solubility slightly soluble in water, soluble in ethanol, ether and dilute acid. |
| Use | For the dye industry, Analytical reagents, adsorption indicators and redox fingers |
Fast Dark Blue Base R - Risk and Safety
| Hazard Symbols | T - Toxic N - Dangerous for the environment  |
| Risk Codes | R22 - Harmful if swallowed R45 - May cause cancer R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R68 - Possible risk of irreversible effects |
| Safety Description | S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S53 - Avoid exposure - obtain special instructions before use. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 3082 9/PG 3 |
Fast Dark Blue Base R - Reference
| Reference Show more | 1. Sun Lian, Department of Chemistry, School of Pharmacy, Xinjiang Medical University, Sun Lian, et al. Qualitative and Quantitative Analysis of 1-Deoxynojirimycin in Xinjiang Medicine Mulberry Leaves [J]. Modern Chinese Medicine, 2016, 18(10):1291-1295. |
Fast Dark Blue Base R - Nature
Open Data Verified Data
White to reddish crystals or crystalline powder. The melting point was 129-131 °c. 340 degrees C decomposition. Slightly soluble in water, soluble in ethanol, ether and dilute acid. Flammable.
Last Update：2025-06-10 22:55:16
Fast Dark Blue Base R - Preparation Method
Open Data Verified Data
O-nitrotoluene is reduced to 2,2 '-methylsymmetric diphenylhydrazine with zinc powder (or ferrosilicon powder) in caustic soda medium, then in the presence of 22.5% sulfuric acid and sodium metabisulfite (or hydrochloric acid), rearrangement to generate 3,3'-= methylbenzidine sulfate (or hydrochloride), plus 30% liquid alkali, deacidification to obtain the finished product. Diphenylhydrazine is weighed and then rearranged in the presence of 22.5% sulfuric acid and sodium metabisulfite (or hydrochloric acid) to form 3,3 '-= methylbenzidine sulfate (or hydrochloride), plus 30% liquid alkali, deacidification to obtain the finished product.
Last Update：2025-06-07 19:20:19
Fast Dark Blue Base R - Safety
Open Data Verified Data
- This product is a derivative of benzidine. Toxic. Can stimulate the skin and mucous membranes. Can be sensitized and can cause bladder cancer. Direct contact with the skin should be avoided. Production equipment should be closed to prevent dust pollution of the air. The operator should wear protective gear.
- The container was packed with a dark plastic bag lined with an iron drum. Store in a cool, ventilated, dry place. According to the provisions of the storage and transportation of toxic and flammable chemicals.
Last Update：2025-06-10 22:55:16
Fast Dark Blue Base R - Nature
| storage conditions | -20°C |
| solubility | 2% HCl: 10 mg/mL, clear |
| acidity coefficient (pKa) | 4.59±0.10(Predicted) |
| morphology | powder (may contain lumps) |
| color index | 37230 |
| color | light brown |
| water solubility | Slightly soluble in water. |
| Merck | 14,9514 |
| BRN | 2210640 |
| exposure limit | TLV-TWA none; carcinogenicity: A2 - Suspected Human Carcinogen (ACGIH), Animal Limited Evidence (IARC). |
| InChIKey | NUIURNJTPRWVAP-UHFFFAOYSA-N |
| NIST chemical information | [1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethyl-(119-93-7) |
| (IARC) Carcinogen Classification | 2B (Vol. 1, Sup 7) 1987 |
| EPA chemical information | 3,3'-Dimethylbenzidine (119-93-7) |
Last Update：2024-04-10 22:29:15
Fast Dark Blue Base R - Security information
| WGK Germany | 3 |
| RTECS number | DD1225000 |
| F | 8 |
| TSCA | Yes |
| HazardClass | 6.1( B ) |
| PackingGroup | III |
| customs code | 29215900 |
| toxic substance data | 119-93-7(Hazardous Substances Data) |
Last Update：2024-04-10 22:29:15
Fast Dark Blue Base R - Uses and synthesis methods
Preparation
o-toluidine is prepared by reducing o-nitrotoluene to 2,2 & prime with zinc powder (or ferrosilicon powder) in sodium hydroxide medium;-dimethyl symmetric diphenylhydrazine, and then rearranging it.
chemical properties
Tolidin Beisi, also known as o-toluidine and diaminodimethylbiphenyl, is white to reddish leaf-like crystals, soluble in alcohol, ether, dilute acid, slightly soluble in water, and has an aniline-like smell.
use
o-toluidine is mainly used as dye intermediate to produce tryptopol AS-G, direct dark green 2B-NB, direct dark brown B- NM, direct yellow brown ND3G, direct black NBN and various organic pigments.
Used in the dye industry, analytical reagents, adsorption indicators and redox indicators
Photometric determination of gold, cerium, and free chlorine. Determination of nitrate, manganese, nitrite, chromium salt, copper salt, cobalt, mercury and cyanide ions in air. The analytical standard is a sensitive colorimetric photosensitivity for the determination of gold and free chlorine.
Used as analytical reagent, adsorption indicator and redox indicator
category
toxic substances
toxicity classification
High toxicity
acute toxicity
abdominal cavity-mouse LDL0: 125 mg/kg
flammability hazard characteristics
Open flame is combustible; it works with oxidants; high heat decomposes toxic nitrogen oxide smoke
storage and transportation features
The warehouse is ventilated and dry at low temperature; stored separately from acids, oxidants, and food additives
fire extinguishing agent
Foam, carbon dioxide, mist water, sand
Last Update：2024-04-10 22:30:23
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Product Name: 3,3'-Dimethylbiphenyl-4,4'-diamine Request for quotation
CAS: 119-93-7
Tel: 0513-66814854
Email: pules.cn@gmail.com
Mobile: +86-17551318830
CAS: 119-93-7
Tel: 0513-66814854
Email: pules.cn@gmail.com
Mobile: +86-17551318830
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Product Name: 3,3'-Dimethylbiphenyl-4,4'-diamine Request for quotationCAS: 119-93-7
Tel: +86-17505207175
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Product Name: 3,3'-Dimethylbiphenyl-4,4'-diamine Request for quotationCAS: 119-93-7
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Product Name: ο-Tolidine Visit Supplier Webpage Request for quotationCAS: 119-93-7
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Product Name: O-Tolidine Visit Supplier Webpage Request for quotationCAS: 119-93-7
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