Lithol rubine

Pigment Red 57, calcium salt [5281-04-9] 15850 1 BONA (Ca salt) (Lithol Rubine B or 4B toner) coupling of dia2oti2ed 2- amino-5-methyl-ben2enesulfonic acid with 3- hydroxy-2-naphthoic acid, foUowed by salt formation... 

The first synthetic organic pigments were used to shade or tone the weaker colorants and became known as toners. Metal toners usually contain one sulfonic acid group and often a carboxyUc acid group. The pigment is rendered iasoluble, ie, laked Ai a heavy metal cation. An example of a calcium salt is Lithol Rubine BK [5858-81-1] Vhl) (Cl Pigment Red 57 Cl 15850). 

Azo dyes Allura Red AC, Amaranth, Azorubine, Brilliant Black BN, Brown FK, Brown HT, Lithol Rubine BK, Ponceau 4R, Red 2G, Sunset Yellow, Tartrazine Triarylmethane (triphenylmethane) dyes Brilliant Blue FCF, Fast green FCF, Green S, Patent Blue V... 

Lithol Rubine BK (E 180, Cl Pigment Red, Rubin Pigment, Carmine 6B) is a mono azo dye, chemical name calcium 3-hydroxy-4-(4-methyl-2-sulfonatopheny-lazo)-2-naphthalenecarboxylate. It is a red powder, slightly soluble in hot water (90°C), insoluble in cold water, insoluble in ethanol. The absorption maximum is 442 mn in dimethylformamide with Ej. = 200. It is not permitted in the US and is restricted to cheese coloring in the EU. "... 

Individually, diarylide yellow AAA, also known as benzidine yellow or Pigment Yellow 12 (PY 12), is made in the greatest amount at 30 million lb, followed by phthalocyanine blue or Pigment Blue 15 3 (PB 15 3) at 28 million lb and Lithol rubine calcium salt or Pigment Red 57 1 (PR 57 1) at 26 million lb. 

Lithol rubine is a second example of an azo dye and is important in printing inks. It is a brilliant color and has high tinting strength, good lightfastness, and solvent resistance. 

LltholRubine. Lithol Rubine (Pigment Red 57 [5281-04-9]), also referred to as 4B toner, is the calcium salt of diazotized 2-amino-5-methylbenzenesulfonic acid coupled with 3-hydroxy-2-naphthoic acid. It ranks high among organic pigments in production volume and use. 

COLORANTS FORPLASTICS] (Vol 6) Lithol Rubine [5281-04-9]. (See also Pigment Red 57.)... 

Lithol Rubine is characterized by high tinctorial strength, good bleed, and hake resistance but poor alkali, soap, and acid resistance. Its lightfastness is considered fair and varies within a wide range of shades obtained by inclusion of auxiliary agents. 

Lithol rubine lakes and toners Maleic anhydride Methyl violet toners Naphtha, solvent made in chemical plants Naphthalene chips and flakes Naphthalene, made in chemical plants... 

C.l. Pigment Red 57 1 C.l. Pigment Red 57, calcium salt (1 1) Calcium 3-hydroxy-4-((4-methyl-2-sulph-onatophenyl)azo)-2-naphthoate CCRIS 4903 Cl 15850 1 (Ca salt) D C Red No. 7 EINECS 226-109-5 3-Hydroxy-4-((4-methyl-2-sulfophenyl)azo)-2-naphtti-alenecarboxylic acid, calcium salt Hydroxy-4-( 2-sulfo-p-tolyl)azo)-2-naphthaleneoarboxylic acid, calcium salt (1 1) Lithol rubin B ca 2-NapMhalenecarboxylic acid, 3-hydroxy-4-((4-methyl-2-sulfophenyljazo)-, calcium salt. 

---