Product Identification

Product Name

Orthoboric acid

Synonyms

Borofax
Boron trihydroxide
Hydrogen orthoborate
Orthoboric acid
Terminator DF
Trihydroxyborane

CAS

10043-35-3

Formula

BH3O3

Molecular Weight

61.83

EINECS

233-139-2

RTECS

ED4550000

RTECS Class

Agricultural Chemical and Pesticide; Tumorigen; Drug; Mutagen; Reproductive Effector; Human Data; Primary Irritant

Merck

13,1326

Beilstein/Gmelin

1585 (G)

EC Index Number

005-007-00-2

Physical and Chemical Properties

Appearance

Colorless, odorless scales or white powder.

Solubility in water

49 g/L

Melting Point

185

Vapor Pressure

2 (20 C)

Density

1.435 g/cm3 (15 C)

pKa/pKb

8.91 (pKa)

Heat Of Vaporization

98.1 kJ/mol

Usage

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.

Odor threshold

Odorless

Refractive Index

1.462

First Aid Measures

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.

Handling and Storage

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.

Hazards Identification

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.

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.

EC Risk Phrase

R 37

EC Safety Phrase

S 22 24/25

Exposure Controls/Personal Protection

Personal 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.

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.

Exposure limit(s)

OEL-RUSSIA:STEL 10 mg/m3

Poison Class

4

Fire Fighting Measures

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

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity

Incompatibilities

Incompatible with acetic anhydride and potassium. Reacts with basic materials to form borate salts.

Stability

Stable at room temperature in closed containers under normal storage and handling conditions.

Decomposition

Oxides of boron.

Transport Information

HS Code

2810 00 90