DESIGNERS GOUACHE/ALIZ RED MADR 14ML
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Products bearing the AP seal of the Art & Creative Materials Institute, Inc. (ACMI) are certified non-toxic. A product can be certified non-toxic only if it contains no materials in sufficient quantities to be toxic or injurious to humans, or to cause acute or chronic health problems.
Product Details
- Color:
- Alizarin Rose Madder
- Description:
- Designers Gouache
- Size:
- 14ml (.47 oz)
- Format:
- Tube
- No.
- 006
- Series:
- 1
Pigment Information
This color contains the following pigments:
PR49:1-Beta Naphthol Red
PV1-Rhodamine B
Pigment Name
PR49:1-Beta Naphthol Red
Pigment Type
organic, monoazo
Chemical Name
barium monoazo red lake
Chemical Formula
Properties
PR49:1, a barium salt of monoazo naphthol red, has a yellowish red tone.
Permanence
Pigments in the beta naphthol group are considered moderately lightfast. The naphthol AS pigments, which are more permanent, have largely taken their place in artist paints.
Toxicity
History
The Beta Naphthol colors were developed in the late 19th century. PR49 has been used in paints, plastics, printing inks, and cosmetics. Most of the PR49:1 pigment manufactured in the United States is used for printing and packaging applications.
Pigment Name
PV1-Rhodamine B
Pigment Type
organic, fluorone dye
Chemical Name
Rhodamine B
Chemical Formula
C28H31N2O3Cl
Properties
Rhodamine B is a staining violet dye that has flourescent properties. It is extremely soluble in both water and alcohol. In art materials, it is laked as a pigment.
Permanence
Rhodamine B, like all fluorescent dyes, is not considered to be lightfast. It is recommended for permanent works of art only if they can be adequately protected from exposure to ultraviolet light.
Toxicity
The fluorescent dye Rhodamine B is toxic, and its use is banned in food, textiles, and cosmetics. It is harmful if swallowed, inhaled, or absorbed through the skin. It has been shown to be carcinogenic in rats when injected subcutaneously, producing local
History
Rhodamine B, discovered in 1887, is used as a staining fluorescent dye in the biological sciences, for microscopy. It is also used as a laser dye. Because of its low cost, high tinting strength, solubility in water and alcohol, and relative stability for a fluorescent, it has sometimes been used as a food colorant, even though its use in food and cosmetics has been banned in most countries for many years. There have been several highly publicized recalls of food and cosmetic products contaminated with Rhodamine B.