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ORTHO-PHTHALALDEHYDEICSC: 1784
1,2-Benzenedicarboxaldehyde
Phthaldialdehyde
OPA
Benzene-1,2-dicarbaldehyde
July 2020
CAS #: 643-79-8
UN #: 2923
EC Number: 211-402-2

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible.    NO open flames.    Use carbon dioxide, dry powder, foam, water.   

 STRICT HYGIENE!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Shortness of breath. Headache.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Artificial respiration may be needed. Refer immediately for medical attention. 
Skin Redness. Pain. Serious skin burns.  Protective gloves. Protective clothing.  Wear protective gloves when administering first aid. Remove contaminated clothes. Rinse skin with plenty of water or shower for at least 15 minutes. Refer immediately for medical attention. 
Eyes Redness. Pain. Severe burns.  Wear face shield or eye protection in combination with breathing protection.  Rinse with plenty of water for several minutes (remove contact lenses if easily possible). Refer immediately for medical attention. 
Ingestion Burns in mouth and throat. Nausea. Diarrhoea. Vomiting.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Refer immediately for medical attention. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Vacuum with specialist equipment (See Notes) or carefully sweep into sealable containers. Carefully collect remainder. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

skull;toxiccorrcancer;health hazenviro;aqua
DANGER
Toxic if swallowed
Causes severe skin burns and eye damage
May cause allergy or asthma symptoms or breathing difficulties if inhaled
May cause an allergic skin reaction
May cause respiratory irritation
Very toxic to aquatic life with long lasting effects 

Transportation
UN Classification
UN Hazard Class: 8; UN Subsidiary Risks: 6.1; UN Pack Group: II 

STORAGE
Well closed. Separated from oxidants, amines, strong bases and food and feedstuffs. Ventilation along the floor. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. 
PACKAGING
Do not transport with food and feedstuffs.
Marine pollutant. 
ORTHO-PHTHALALDEHYDE ICSC: 1784
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
YELLOW SOLID IN VARIOUS FORMS WITH CHARACTERISTIC ODOUR. 

Physical dangers
 

Chemical dangers
Reacts with oxidants, amines and strong bases. This generates fire and explosion hazard. 

Formula: C6H4(CHO)2 / C8H6O2
Molecular mass: 134.1
Boiling point: see Notes
Melting point: 55.8°C
Density (at 20°C): 1.13 g/cm³
Solubility in water, g/100ml at 20°C: 3.8 (soluble)
Vapour pressure, Pa at 25°C: 0.6
Relative vapour density (air = 1): 4.6
Flash point: 132°C c.c.
Octanol/water partition coefficient as log Pow: 0.99 (30°C) 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
Serious local effects on contact with eyes and skin. The substance can be absorbed into the body by inhalation of its vapour or dust and by ingestion. 

Effects of short-term exposure
The substance is corrosive to the eyes and skin. The substance is irritating to the respiratory tract. 

Inhalation risk
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C. 

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation may cause asthma. See Notes. 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 25 μg/100 cm2 (surface limit value); (vapour): 0.1 ppb (ceiling value); (see Notes); (skin); (DSEN); (RSEN) 

ENVIRONMENT
The substance is very toxic to aquatic organisms. The substance may cause long-term effects in the aquatic environment. It is strongly advised not to let the chemical enter into the environment. 

NOTES
NEVER use a domestic-type vacuum cleaner to vacuum the substance, only use specialist equipment.
The occupational exposure limit value should not be exceeded during any part of the working exposure.
The symptoms of asthma often do not become manifest until a few hours have passed and they are aggravated by physical effort.
Anyone who has shown symptoms of asthma due to this substance should avoid all further contact.
Boiling point at 0.1kPa: 83°C 

ADDITIONAL INFORMATION
  EC Classification
 

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