Pigment Red 23

487.42100

487.42

229-313-2

082H78U257

DTXSID3021227

174.92000

7.15750

C.i. pigment red 23 is a red to bluish red powder. (NTP, 1992)

1.47 g/cm3

330-340ºC

692.8ºC at 760 mmHg

372.8ºC

1.693

<0.1 g/100 mL at 22 ºC

Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.

Azo dyes can be explosive when suspended in air at specific concentrations. Insoluble in water.

Amides and Imides

Explosive

C.I. PIGMENT RED 23 is sensitive to light and may be sensitive to heat. This compound is incompatible with strong oxidizing agents. (NTP, 1992). It is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.

Stable, but light sensitive. Incompatible with strong oxidizing agents.

DHHS/NTP; Toxicology & Carcinogenesis Studies of C.I. Pigment Red 23 in F344/N Rats and B6C3F1 Mice Technical Report Series No. 411 (1992) NIH Publication No. 93-3142

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

Fires involving this material should be controlled using a dry chemical, carbon dioxide or Halon extinguisher. (NTP, 1992)

SMALL SPILLS AND LEAKAGE: If you spill this chemical, dampen the solid spill material with 5% sodium carbonate, then transfer the dampened material to a suitable container. Use absorbent paper dampened with 5% sodium carbonate to pick up any remaining material. Your contaminated clothing and the absorbent paper should be sealed in a vapor-tight plastic bag for eventual disposal. Wash all contaminated surfaces with 5% sodium carbonate 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 light. Keep it away from oxidizing materials and store it under refrigerated 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)

... Toxicology and carcinogenicity studies were conducted by feeding groups of rats and mice diets containing C.I. Pigment Red 23 (greater than 96% pure) for ... 2 years. ... Doses of 0, 10,000, 25,000, or 50,000 ppm were selected for the 2 yr studies. ... Conclusions: Under the conditions of these 2 yr feed studies, there was equivocal evidence of carcinogenic activity of C.I. Pigment Red 23 in male F344 rats as evidenced by a marginally increased incidence of renal tubule cell neoplasms. There was no evidence of carcinogenic activity of C.I. Pigment Red 23 in female F344 rats fed diets containing 10,000, 25,000, or 50,000 ppm. Mononuclear cell leukemia occurred with a decreased incidence in male and female rats receiving C.I. Pigment Red 23. There was no evidence of carcinogenic activity of C.I. Pigment Red 23 in male and female B6C3F1 mice fed diets containing 10,000, 25,000 or 50,000 ppm.

SYMPTOMS: Symptoms of exposure to this compound may include eye irritation, skin sensitivity, cyanosis, pronounced coloring of the skin, blockage of the upper respiratory tract, anemia and possible liver damage. ACUTE/CHRONIC HAZARDS: This compound may cause irritation on contact. It is absorbed rapidly through the skin. When heated to decomposition it emits toxic fumes. (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)

1-(2-methoxy-5-nitrophenylazo)-2-hydroxy-3-(3-nitrophenylcarbamoyl)naphthalene

Paint and coating manufacturing|2-Naphthalenecarboxamide, 3-hydroxy-4-[2-(2-methoxy-5-nitrophenyl)diazenyl]-N-(3-nitrophenyl)-: ACTIVE