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By the dawn of the 20th century, Scheele's green had completely fallen out of use as a pigment but was still in use as an insecticide into the 1930s. [ 6 ] [ 7 ] At least two modern reproductions of Scheele's green hue with modern non-toxic pigments have been made, with similar but non-identical color coordinates: one with hex#3c7a18 (RGB 60 ...
Sodium arsenite can be inhaled or absorbed through the skin. Along with its known carcinogenic and teratogenic effects, contact with the substance can yield symptoms such as skin irritation, burns, itching, thickened skin, rash, loss of pigment, poor appetite, a metallic or garlic taste, stomach pain, nausea, vomiting, diarrhea, convulsions, decreased blood pressure, and headache.
Arsenite of lime and arsenate of lead were used widely as insecticides until the discovery of DDT in 1942. [ 78 ] [ 79 ] [ 80 ] In small doses, soluble arsenic compounds act as stimulants , and were once popular as medicine by people in the mid-18th to 19th centuries; [ 23 ] [ 81 ] [ 82 ] this use was especially prevalent for sport animals such ...
Sodium arsenite; V. Vanarsite This page was last edited on 1 November 2023, at 16:19 (UTC). Text is available under the Creative Commons Attribution ...
Cobalt pigments. Aureolin or cobalt yellow (PY40): potassium cobaltinitrite (K 3 Co(NO 2) 6). Iron pigments. Yellow ochre (PY43): a naturally occurring clay of monohydrated ferric oxide (Fe 2 O 3 ·H 2 O). Lead pigments. Naples yellow (PY41). Lead-tin-yellow: PbSnO 4 or Pb(Sn,Si)O 3. Titanium pigments. Titanium yellow (PY53): NiO·Sb 2 O 3 ...
Ortho-arsenite contrasts to the corresponding anions of the lighter members of group 15, phosphite which has the structure HPO 2− 3 and nitrite, NO − 2 which is bent. [1] A number of different arsenite anions are known: AsO 3− 3 ortho-arsenite, an ion of arsenous acid, with a pyramidal shape [1] (AsO − 2) n meta-arsenite, a polymeric ...
Arsenic poisoning is a global problem arising from naturally occurring arsenic in ground water. The evidence that arsenic may be a beneficial nutrient at trace levels below the background to which living organisms are normally exposed has been reviewed. [3]
Algae also use chlorophyll, but various other pigments are present, such as phycocyanin, carotenes, and xanthophylls in green algae, phycoerythrin in red algae (rhodophytes) and fucoxanthin in brown algae and diatoms resulting in a wide variety of colors. These pigments are embedded in plants and algae in complexes called antenna proteins.