3,5-Dichloro-2-hydroxybenzoic acid

  • 3,5-Dichlorosalicylic acid
Formula
C7H4Cl2O3
Structure
Description
Needles from dil alc, rhombic prisms.

Registry Numbers and Inventories.
CAS
320-72-9
EC (EINECS/ELINCS)
206-281-8
RTECS
VO2450000
RTECS class
Other
Beilstein/Gmelin
2210803
Beilstein Reference
4-10-00-00213
Swiss Giftliste 1
G-5647
Canada DSL/NDSL
NDSL
US TSCA
Listed

Properties.
Formula
C7H4Cl2O3
Formula mass
207.01
Boiling point, °C
319
Vapor pressure, mmHg
0.00014 (25 C)
Solubility in water
Soluble
pKa/pKb
1.99 (pKa)
Partition coefficient, pKow
4.40
Heat of vaporization
59.2 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.
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.
Small spills/leaks
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions.
Stability
No data.
Incompatibilities
Oxidizing agents.
Decomposition
Chlorine.

Fire.
Flash Point,°C
146
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Use agent most appropriate to extinguish fire.

Health.
Poison_Class
3
Exposure effects
Hyperventilation, mild rapid heart rate and elevated body temperature are common; abnormally low blood pressure may develop in severe overdose. Lethargy, agitation and confusion may be early findings in patients with severe toxicity. Coma and seizures may develop subsequently. Cerebral edema is a common autopsy finding. Chronic maternal ingestion is associated with an increased incidence of stillbirths, antepartum/postpartum bleeding, prolonged pregnancy/labor, and lower birth weight.
   Ingestion
The toxicological properties of this substance have not been fully investigated.
   Inhalation
The toxicological properties of this substance have not been fully investigated. Inhalation of dust may cause respiratory tract irritation.
   Skin
No information regarding skin irritation and other potential effects was found.
   Eyes
Dust may cause mechanical irritation. No information regarding eye irritation and other potential effects was found.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   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.

Transport.