2-Mercaptobenzimidazole

150.2

150.20

119867

209-502-6

619CVM6HOK

186246|21414

2811

DTXSID9025536

2933990090

56.2

1.7

White to beige Powder

1.42

298 °C

270.6ºC at 760mmHg

>250°C

1.771

H2O: <0.1 g/100 mL at 23.5 ºC

Refrigerator, Under Inert Atmosphere

30.2 mm Hg at 142° F (NTP, 1992)

Oral-mouse LD50: 750 mg/kg; peritoneal-mouse LD50: 200 mg/kg

Flammable; burning produces toxic nitrogen oxides and sulfur oxide fumes

Dust explosion: 0.140 oz/ft3. Insoluble in water. This chemical is moisture sensitive. (NTP, 1992).

Amines, Phosphines, and Pyridines

An organosulfide and an amine. Organosulfides are incompatible with acids, diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents. Reactions with these materials generate heat and in many cases hydrogen gas. Many of these compounds may liberate hydrogen sulfide upon decomposition or reaction with an acid. Amines are chemical bases. They neutralize acids to form salts plus water. These acid-base reactions are exothermic. The amount of heat that is evolved per mole of amine in a neutralization is largely independent of the strength of the amine as a base. Amines may be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen is generated by amines in combination with strong reducing agents, such as hydrides.

III

6.1

UN 2811 6.1/PG 3

2

20/21/22-36/37/38-22

26-36-24/25

DE1050000

Xn

Ventilated, low temperature and dry

Stable. Incompatible with strong oxidizing agents.

P261-P280-P301 + P310-P305 + P351 + P338

H301-H312 + H332-H315-H319-H335

Flash point data for this chemical are not available; however, it is probably combustible. (NTP, 1992)

|Danger|H301 (79.92%): Toxic if swallowed [Danger Acute toxicity, oral]|P260, P261, P264, P270, P271, P272, P273, P280, P301+P310, P301+P312, P302+P352, P304+P312, P304+P340, P305+P351+P338, P312, P314, P321, P322, P330, P332+P313, P333+P313, P337+P313, P361, P362, P363, P403+P233, P405, and P501|Aggregated GHS information provided by 254 companies from 26 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. A water spray may also be used. (NTP, 1992)

Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]: As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. SPILL: Increase, in the downwind direction, as necessary, the isolation distance shown above. FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)

SMALL SPILLS AND LEAKAGE: If a spill of this chemical occurs, FIRST REMOVE ALL SOURCES OF IGNITION, then you should dampen the solid spill material with acetone and transfer the dampened material to a suitable container. Use absorbent paper dampened with acetone to pick up any remaining material. Seal your contaminated clothing and the absorbent paper in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with acetone followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned. STORAGE PRECAUTIONS: You should protect this material from exposure to moisture. Keep it in a tightly closed container under inert atmosphere and store it under ambient temperatures. (NTP, 1992)

RECOMMENDED RESPIRATOR: Where the neat test chemical is weighed and diluted, wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter. (NTP, 1992)

moderately toxic

2.57

SYMPTOMS: Inhalation of the dust of this compound may cause respiratory tract irritation, resulting in runny nose, sneezing, coughing and chest discomfort. ACUTE/CHRONIC HAZARDS: When heated to decomposition this compound emits very toxic fumes of sulfur oxides and nitrogen oxides. Inhalation of the dust may cause respiratory tract irritation. (NTP, 1992)

EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop. SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment. INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing. INGESTION: DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. (NTP, 1992)

2-mercaptobenzimidazole

2H-Benzimidazole-2-thione, 1,3-dihydro-: ACTIVE