Dyes are intensely colored or fluorescent organic substances only, which impart color to a substrate by selective absorption of light. Pigments are colored, black, white or fluorescent particulate organic or inorganic solids which usually are insoluble in, and essentially physically and chemically unaffected by, the vehicle or substrate in which they are incorporated.
Sunset yellow FCF: a permitted food dye
Sunset Yellow FCF (SY), used frequently in ready-made foods, cosmetics, and the pharmaceutical industry, may cause many health problems.
Mar 13，2025 Dyes and Pigments
Q：How does 3,3′-diaminobenzidine enhance fingermarks in blood
A：The reagent 3,3'-Diaminobenzidine (DAB) is a sensitive alternative to protein stains to enhance fingermarks in blood. In contact with blood, DAB is oxidized to give a brown solid precipitating on the
Dec 9，2024 Dyes and Pigments
The Thioflavin T assay
Thioflavin T (ThT) is a commonly used probe to monitor vitro amyloid fibril formation.
Oct 31，2024 Dyes and Pigments
Synthesis of Indigo Dye
Indigo is a pigment extracted from the leaves of indigo-bearing plants and is the oldest natural source of blue dye in the world. This article will introduce its synthesis method.
Aug 1，2024 Dyes and Pigments
Q：Is Rhodamine B safety?
A：A textile dye, Rhodamine B, is toxic to the human body.
May 29，2024 Dyes and Pigments
The introduction of p-Phenylenediamine
PPD has a strong protein binding ability to penetrate deeply into the hair. It is widely used as an oxidizable hair dye for its free availability and low cost.
May 14，2024 Dyes and Pigments
Related Information about Methylene Blue
Methylene Blue is used as an antidote to drug-induced methemoglobinemia and in surgical sciences for staining the surgical field.
Nov 29，2023 Dyes and Pigments
What is Dicyclohexylamine?
Dicyclohexylamine is a clear yellow liquid with a faint fishlike odor. It is used as acatalyst for paint, varnishes and inks. May be toxic by ingestion. Severely irritates skin, eyes and mucous membra
Oct 25，2023 Dyes and Pigments
What is p-anisidine?
p-Anisidine is a yellow to brown crystalline (sand-like) solid with a fishy odor. It is used as an intermediate in making dyes.
Oct 20，2023 Dyes and Pigments
Rhodamine B: Applications, toxicity and metabolism
Rhodamine B is an organic chloride salt used as a fluorochrome. Rhodamine B has a role as a fluorochrome, a fluorescent probe and a histological dye.
Jun 6，2023 Dyes and Pigments