Dinitrophenol

  • Dinitrophenol (mixed isomers)
Formula
C6H4N2O5
Structure
Description
A yellow crystalline solid.
Uses
Dyes, especially sulfur colors, picric acid, picramic acid, preservation of lumber, manufacture of the photographic developer diaminophenol hydrochloride, explosives manufacture, indicator, reagent for k and nh4 ions.

Registry Numbers and Inventories.
CAS
25550-58-7
EC (EINECS/ELINCS)
247-096-2
EC Index Number
609-016-00-8
EC Class
Toxic; Danger of cumulative effects; Dangerous for the Environment
RTECS
SL2625000
RTECS class
Agricultural Chemical and Pesticide
UN (DOT)
1320
Beilstein/Gmelin
NA
New Zealand
Listed

Properties.
Formula
C6H4N2O5
Formula mass
184.12
Melting point, °C
63
Vapor density (air=1)
6.35
Density
1.68 g/cm3 (20 C)
Solubility in water
Slightly soluble
Partition coefficient, pKow
1.37-1.75

Hazards and Protection.
Storage
Dinitrophenol. Should be stored in a cool ventilated place away from area of acute fire hazard, and away from powerful oxidizing agents.
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.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Keep spilled material wet. Do not attempt to sweep up dry material. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: Use natural deep water pockets, excavated lagoons, or sand bag barriers to trap material at bottom. If dissolved, in region of 10 ppm or greater concentration, apply activated carbon at ten times the spilled amount. Remove trapped material with suction hoses. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.
Stability
Appear to be stable in acid solution, but are susceptible to decomposition by UV radiation in alkaline solution.
Incompatibilities
If mixed with reducing agents, including hydrides, sulfides and nitrides, they may begin a vigorous reaction that culminates in a detonation Reacts as weak organic acids Incompatible with strong reducing substances such as hydrides, nitrides, alkali metals, and sulfides.
Decomposition
When heated to decomposition it emits toxic fumes of oxides of nitrogen. Prolonged exposure to fire or heat may result in the spontaneous decomposition and heating with a resultant explosion.

Fire.
Fire fighting
Dangerously explosive. Flood with water. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.
Fire potential
Flammable/combustible material.
Hazards
May be ignited by heat, sparks or flames. DRIED OUT material may explode if exposed to heat, flame, friction or shock; Treat as an explosive. Keep material wet with water or treat as an explosive. Runoff to sewer may create fire or explosion hazard. MAY EXPLODE AND THROW FRAGMENTS 1600 meters (1 MILE) OR MORE IF FIRE REACHES CARGO.
Combustion products
Toxic oxides of nitrogen are during produced during combustion of this material.

Health.
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
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth anddrink 2-4 cupfuls of milk or water.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   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
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
1320
Response guide
Hazard class
4.1
Packing Group
I
 
USCG CHRIS Code
DNF
 
Std. Transport #
4917513