Product Identification

Product Name

2,3,5-Triphenyl-2H-tetrazolium chloride

Synonyms

1,3,5-Triphenyl-2H-tetrazolium chloride
1,3,5-Triphenyltetrazolium chloride
2,3,5-Triphenyl-2H-tetrazolium chloride
Tetrazolium chloride
Triphenyltetrazolium chloride
Vitastain

CAS

298-96-4

Formula

C19H15ClN4

Molecular Weight

334.8

EINECS

206-071-6

RTECS

XF8100000

RTECS Class

Other

Merck

12,9874

Beilstein/Gmelin

3923356

Beilstein Reference

4-26-00-01774

Physical and Chemical Properties

Appearance

Odorless, colorless to yellow solid

Melting Point

235

Boiling Point

>360

Usage

Substance is used in analytical chemistry as a sensitive reagent for reducing sugars, and to distinguish between ketols and simple aldehydes.

Vapor Density

11.5

First Aid Measures

Ingestion

If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.

Inhalation

Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.

Skin

Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.

Eyes

Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Handling and Storage

Storage

Store in a cool, dry place. Do not store in direct sunlight.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Avoid contact with skin and eyes. Avoid ingestion and inhalation.

Hazards Identification

Ingestion

Causes gastrointestinal irritation with nausea, vomiting and diarrhea.

Inhalation

Causes respiratory tract irritation.

Skin

Causes skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material.

Eyes

Causes eye irritation. May result in corneal injury.

EC Safety Phrase

S 22 24/25

Exposure Controls/Personal Protection

Personal Protection

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

Respirators

Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Fire Fighting Measures

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: For small fires, use water spray, dry chemical, carbon dioxide or chemical foam.

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container.

Stability and Reactivity

Stability

Stable at room temperature in closed containers under normal storage and handling conditions.

Incompatibilities

Strong oxidizers.

Decomposition

Hydrogen chloride, carbon monoxide, oxides of nitrogen, carbon dioxide.