Our Products >>> Naphthol Dyes and Bases
 
Cotton, rayon, and other celluosic fibers, as well as silk, can also be dyed with azoic or naphthol dyes. (Naphthol is sometimes also spelled as 'napthol' or 'naphtol'; the latter is the German spelling.) Naphthol dyes are true cold water dyes. The "cold" water used in fiber reactive dyes such as Procion MX dyes should, ideally, be between 35° to 41°C, although temperatures as low as 21°C may be used. In contrast, naphthol dyes may be used in ice water. Both fiber reactive and naphthol dyes are suitable for use in batik, since they do not require heat that would melt the wax to set the dye.
 
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Safety Measures
Since many of the components used in naphthol dyeing are known or suspected carcinogens, they should not be used in your kitchen. They should be used only in a lab, or in a dye studio in which good laboratory practices are invariably followed. These include strict cleanliness, and strict use of protective clothing such as goggles, face masks, gloves, and lab coats (none of which are to be worn outside of the lab). Dye powder must not be allowed to become airborne, and should be handled in a fume hood. Dye powders and solutions must never be allowed to contact the skin. Food and drink must never be consumed at any time in the laboratory. If you do use naphthol dyes at home, you must be sure to follow all of these precautions, and use the dyes out-of-doors only, never inside the home. Do not use around children.

Unlike many other potential carcinogens, some of the carcinogenic diazonium salts can be can be absorbed directly through even unbroken skin. This makes it critical to avoid ALL skin contact! Disposable latex gloves are not suitable because they are too short, and they frequently develop holes during use.
 
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chemical hazards
Chemical Hazardus Information

Fast Blue B Base
  • suspected carcinogen
  • eye irritant
  • toxic when inhaled or ingested
  • in solution can be absorbed through the skin
  • very toxic

Fast Blue BB Base
  • carcinogen

Fast Red Base
  • combustible powder - keep away from heat or naked flame
  • suspected carcinogen
  • eye and respiratory tract irritant
  • harmful or act as an irritant
  • toxicology not fully investigated

Fast Red B Base
  • potential carcinogen
  • irritant to eyes and the respiratory tract
  • very toxic

Fast Red TR Base
  • combustible powder - keep away from heat or naked flame
  • suspected carcinogen
  • eye and respiratory tract irritant
 
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Handelling & Storage

Handling: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid breathing dust.

Storage: Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
 
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