2,5-di-t-Pentylhydroquinone

  • 2,5-bis(1,1-dimethylpropyl)-1,4-benzenediol
  • 2,5-bis(1,1-dimethylpropyl)hydroquinone
  • Dahq
  • 2,5-di-T-Amylhydroquinone
  • 2,5-di-tert-Amylhydroquinone
  • 2,5-di-tert-Pentylhydroquinone
Formula
C16H26O2
Structure
Description
Crystals.
Uses
Antioxidant for uncured rubber & for unsaturated resins & oils, food packaging, polymerization inhibitor.

Registry Numbers and Inventories.
CAS
79-74-3
EC (EINECS/ELINCS)
201-222-2
RTECS
MX6300000
RTECS class
Reproductive Effector
UN (DOT)
1325
Merck
12,3359
Beilstein/Gmelin
2214556
Beilstein Reference
3-06-00-04748
Swiss Giftliste 1
G-8155
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C16H26O2
Formula mass
250.38
Melting point, °C
185
Boiling point, °C
349
Critical temperature
539
Critical pressure
22.3
Density
1.05 g/cm3 (25 C)
Solubility in water
Slightly soluble
Partition coefficient, pKow
5.50

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders 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
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Make no contact with the spilled material. ELIMINATE all ignition sources and ground all equipment. With clean shovel place material into clean, dry container and cover loosely; move containers from spill area.
Stability
No data.

Fire.
Fire fighting
Small Fires: Dry chemical, carbon dioxide, sand, earth, water spray or regular foam. Large Fires: Water spray, fog or regular foam.
Fire potential
Flammable/combustible material. May be ignited by friction, heat, sparks or flames.
Combustion products
Fire may produce irritating and/or toxic gases.

Health.
Poison_Class
3
Exposure effects
Dizziness, headache and delirium have been reported with hydroquinone exposure. Quinone has cause paralysis of the medullary centers and coma. Both quinone and hydroquinone may cause seizures. In rat studies, maternal toxic effects from exposure to hydroquinone included changes in the ovaries, fallopian tubes, and menstrual cycle. Post-implantation mortality was also observed in rat studies. <br>Observed paternal toxic effects from exposure to hydroquinone included changes in the testes, epididymis, sperm duct, prostate, seminal vesicle, Cowper's gland, accessory glands, and male fertility index. <br>Exposure to hydroquinone produced skeletal malformations in chickens and ocular and skeletal malformations in rabbits.
   Ingestion
Vomiting and gi tract irritation have been seen.
   Inhalation
Ingestion has caused dyspnea, anoxia, and respiratory failure. Quinone has caused asphyxia and pulmonary damage.
   Skin
May cause burns.
   Eyes
See Skin.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
   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
1325
Response guide
Hazard class
4.1
Packing Group
II; III