Boric acid

  • Hydrogen orthoborate
  • Orthoboric acid
  • Boron trihydroxide
  • Trihydroxyborane
  • Borofax
  • Terminator DF
Formula
H3BO3
Structure
Description
Colorless, odorless scales or white powder.
Uses
Weatherproofing wood, nickling baths, for printing & dyeing, & for impregnating wicks, manufacture cements, crockery, porcelain, enamels, glass, borates, leather, carpets, hats, soaps, artificial gems, in painting, photography, electric condensers, hardening steel.

Registry Numbers and Inventories.
CAS
10043-35-3
EC (EINECS/ELINCS)
233-139-2
EC Index Number
005-007-00-2
S 22 24/25
RTECS
ED4550000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Drug; Mutagen; Reproductive Effector; Human Data; Primary Irritant
Merck
13,1326
Beilstein/Gmelin
1585 (G)
EPA OPP
11001
Swiss Giftliste 1
G-1285
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
BH3O3
Formula mass
61.83
Melting point, °C
185
Decomposition point, °C
300
Vapor pressure, mmHg
2 (20 C)
Odor Threshold Odor threshold Odorless
Density
1.435 g/cm3 (15 C)
Solubility in water
49 g/L
Refractive index
1.462
pKa/pKb
8.91 (pKa)
Heat of vaporization
98.1 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Minimize dust generation and accumulation. 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
Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Incompatible with acetic anhydride and potassium. Reacts with basic materials to form borate salts.
Decomposition
Oxides of boron.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Substance is noncombustible; use agent most appropriate to extinguish surrounding fire.
Fire potential
Not flammable
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OEL-RUSSIA:STEL 10 mg/m3
Poison_Class
4
Exposure effects
Prolonged or repeated skin contact may cause dermatitis. May cause borism characterized by dry skin, skin eruptions, and gastric disturbances.. Infants and young children are more susceptible to boric poisoning.
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May cause central nervous system depression, characterized by excitement, followed by headache, dizziness, drowsiness, and nausea. Advanced stages may cause collapse, unconsciousness, coma and possible death due to respiratory failure. May cause tissue anoxia, characterized by weakness, headache, dizziness, confusion, cyanosis, weak and irregular heart beat, collapse, unconsciousness, convulsions, coma and death.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation. May be absorbed through damaged or abraded skin in harmful amounts.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
Induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
USCG CHRIS Code
BAC
 
HS Code
2810 00 90
 
IMO Pollution Category
D