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外観
暗赤褐色, 粉末又は塊
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定義
本品は、平成15年厚労省令第126号に示される赤色2号又はそのアルミニウムレーキである。
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溶解性
水にやや溶けやすく、エタノールに溶けにくい。
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用途
硫酸または酢酸浴で羊毛および絹を染め、絹の場合、均染料も良い。堅ロウ度 : アルカリ、洗濯に良または可、日光に可。医薬品および化粧品の着色料にも用いられる。分析用試薬 : 強い酸化剤によって分解され、無色になるので、ヨウ素酸塩滴定、次亜塩素酸塩滴定において、酸化還元指示薬として用いられる。還元体は赤色、酸化体は無色。変色は不可逆である。
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化粧品の成分用途
着色剤
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説明
Amaranth (FD & C Red No. 2) consists essentially of a trisodium 2-hydroxy-l-(4-sulfonato-1-naphthy lazo)naphthalene 3,6-disulfonate and subsidiary coloring matters together with sodium chloride and/or sodium sulfate as the principal uncolored components. Amaranth may be converted to the corresponding aluminum lake.
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化学的特性
solid
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使用
Dyeing wool and silk bright bluish-red from an acid bath. Food colorant. As indicator. In color photography.
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定義
An azo dye derived from naphthionic and
R acids.
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世界保健機関（WHO）
Approval of amaranth as a permitted colouring agent in foods and
pharmaceutical products was withdrawn by the United States FDA in 1976, on the
basis of positive findings in carcinogenicity tests which were later disputed on
technical grounds and which have not been confirmed in subsequent tests. It has
since been withdrawn by some other national regulatory authorities because of
uncertainty regarding its safety, but elsewhere it remains widely used.
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一般的な説明
Dark red to dark purple powder. Almost no odor. Tastes salty. pH (1% solution in water) approximately 10.8. Used to dye wool and silk bright bluish-red from an acid bath.
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空気と水の反応
Can be explosive as an airborne dust at certain concentrations. Moderately soluble in water.
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反応プロフィール
Acid Red 27 may form toxic gases 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. May form flammable gases with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.
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危険性
A questionable carcinogen. May not be
used in foods, drugs, or cosmetics.
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火災危険
Flash point data for Acid Red 27 are not available; however, Acid Red 27 is probably combustible.
