2,6-Dinitrophenol

  • beta-dinitrophenol
Formula
C6H4N2O5
Structure
Description
Yellow crystalline solid with a sweet musty odor.
Uses
In manufacture of dyes and organic chemicals, as indicator.

Registry Numbers and Inventories.
CAS
573-56-8
EC (EINECS/ELINCS)
209-357-9
EC Index Number
609-054-00-5
EC Class
Toxic; Danger of cumulative effects; Dangerous for the Environment
RTECS
SL2975000
RTECS class
Drug
UN (DOT)
1663
Merck
12,3335
Beilstein/Gmelin
1913410
Beilstein Reference
4-06-00-01383
Swiss Giftliste 1
G-1947
New Zealand
Listed

Properties.
Formula
C6H4N2O5
Formula mass
184.10
Melting point, °C
62 - 64
Boiling point, °C
239
Vapor pressure, mmHg
0.027 (25 C)
Vapor density (air=1)
6.35
Odor Threshold Odor threshold 10 mg/L
Density
1.645 g/cm3
Solubility in water
slightly soluble
pKa/pKb
3.81 (pKa)
Partition coefficient, pKow
1.37
Heat of fusion
18.5 kJ/mol
Heat of vaporization
49.5 kJ/mol
Heat of combustion
-2607 kJ/mol

Hazards and Protection.
Storage
Keep containers tightly closed, avoid heat, and avoid storage with less than 15% water. Protect from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
People exposed to the solid, or to a strong soln should wear protective clothing, hand protection, and, in confined spaces, the use of respiratory protective equipment. Safety goggles or face mask, butyl rubber gloves and boots.
Respirators
Self-contained breathing apparatus.
Small spills/leaks
ELIMINATE all ignition sources. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Stability
Salts of dnp explode when heated. Dry state is also explosive.
Incompatibilities
Reacts as weak organic acids Incompatible with strong reducing substances such as hydrides, nitrides, alkali metals, and sulfides.

Fire.
Flash Point,°C
105
Fire fighting
Fire Extinguishing Agents: Water, dry chemical, CO 2 , foam
Fire potential
Combustible, will support its own combustion.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Combustion products
Dissociation into irritating nitrogen oxides.

Health.
Poison_Class
2
Exposure effects
Blood pressure, pulse, respiratory rate, and temperature may all be elevated after exposure. In severe poisoning, restlessness, seizures, and coma may occur. Animal studies show developmental malformations involving the neurologic, ophthalmic, urologic, and skeletal systems of offsprings.
   Ingestion
Nausea, vomiting, and abdominal pain may be prominent.
   Inhalation
Dyspnea, tachypnea, cyanosis, and pulmonary edema may occur.
   Skin
Yellow staining of skin occurs following contact with nitrophenols. Diaphoresis is common.
   Eyes
Cataracts, secondary glaucoma, symblepharon, paresis of accomodation, and nystagmus have been reported.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Remove from contaminated area. Administer oxygen and artificial respiration if needed.
   Skin
Wash affected areas of skin and hair vigorously with soap and water. Dermal exposure is usually accompanied by a yellowish discoloration which does not have to be removed completely to prevent absorption.
   Eyes
Flush with water.

Transport.
UN number
1663
Response guide
Hazard class
6.1
Packing Group
III
 
USCG CHRIS Code
DNH