Lemon yellow pigment

The most important application of praseodymium is the production of very beautiful high ta[tperature resistant lemon-yellow pigments for the ceramic industry. The praseodymium is built into the zirconium silicate lattice and therd y yields full optical splendor. 

Nickel rutile yellow [8007-18-9], C.I. Pigment Yellow 53 77788, is a light lemon yellow pigment with the approximate composition (Ti0 85Sb0 10Ni0 05)O2. Antimony can be replaced by niobium without any appreciable change in color [3.79]. 

Synonyms lemon yellow permanent yellow C.I. Pigment yellow 31 Baryta yellow ultramarine yellow C. I. 77103 Steinbuhl yellow. 

The thirty-third member of the Periodic Table has a sinister reputation. Since its isolation in the Middle Ages the main use of arsenic compounds has been the termination of lifeforms. Its use for homicide was widened to include inter alia herbicide, fungicide and bactericide (see Section 28.7). Various arsenic compounds have been used from ancient times as pigments, e.g, lemon-yellow orpiment, As2S3, and red realgar, As4S4. 

The most important chromate pigments include the lead chromate (chrome yellow) and lead molybdate pigments (molybdate orange and molybdate red) whose colors range from light lemon yellow to reds with a blue hue. Chrome yellow,... 

Zinc chromate ZnCr04 [13530-65-9] chromic acid-zinc salt (1 1) zinc yellow C.I. Pigment Yellow 36 lemon yellow powder insoluble... 

The principal red and yellow pigments are Lead chromate chrome yellow, orange and red), zinc chromate zinc or buttercup yellow), barium chromate lemon yellow or yellow ultramarine) various products based on jerric oxide, hydrated (yellow) or anhydrous (red), both natural yellow and red ochres) and artificial Mars yellow, English red, etc.) red oxide oj lead minium or red lead) mercuric sulphide cinnabar, vermilion) antimony oxysulphide antimony cinnabar) cadmium sulphide cadmium yellow) basic lead antimonate Naples yellow). 

Five chemical compositions constitute these pigment classes. Medium chrome yellow is essentially PbCr04 and is the reddest hue of yellow. Solid solutions of PbCr04 with PbS04 in varying proportions yield primrose and lemon chrome yellows. Their hue difference is also attributable to the their polymorphic nature— primrose yellow is orthorhombic in crystal structure and lemon yellow is monoclinic. The less stable orthorhombic crystal is treated during primrose yellow manufacture to minimize hue shifts and conversion. 

SYNS BARIUM CHROMATE (1 1) BARIUM CHROMATE OXIDE BARYTA YELLOW CHROMIC ACID, BARIUM SALT (1 1) D C.I, 77103 C.I. PIGMENT YELLOW 31 LEMON CHROME LEMON YELLOW PERMANENT YELLOW STEINBUHL YELLOW ULTRAMARINE YELLOW... 

LEAD CHROMATE(VI) LEIPZIG YELLOW LEMON YELLOW PARIS YELLOW PIGMENT GREEN 15 PLUMBOUS CHROMATE PURE LEMON CHROME L3GS... 

SYNS CHROMIC ACID, STRONTIUiM SALT (1 1) C.I. PIGMENT YELLOW 32 DEEP LEMON YELLOW STRONTIUM CHROMATE (VI) STRONTIUM CHROMATE 12170 STRONTIUM YELLOW... 

Paints often contain solvents such as toluene, xylene, halogenated aromatic hydrocarbons, and methylene chloride, as well as heavy metals in their pigments including chromium yellow, lemon yellow (barium chromate), vermilion red (cadmium and mercuric sulfides), and flake white (lead). Both acute and chronic exposures to toluene and xylene are associated with neurotoxicity and can also damage the liver and kidneys. 

Lemon-yellow crystals, dec 242-245. Freely sol in methanol, ethanol, chloroform. Slightly sol in water. Insol in ethyl acetate, acetone, ether. Reduction potential about —0.08 volt. Yields a dark blue diformazan pigment in the presence of a reducing agent. 

CAS 10294-40-3 EINECS/ELINCS 233-660-5 Synonyms Barium chromate (1 1) Barium chromate (VI) Barium chromate oxide Baryta yellow Chromic acid barium salt (1 1) Cl 77103 Lemon chrome Lemon yellow Permanent yellow Pigment yellow 31 Ultramarine yellow Empirical Ba-CrO,... 

Cl 77103 Lemon chrome Lemon yellow Permanent yellow Pigment yellow 31 Ultramarine yellow Empirical Ba Cr04... 

Ferro lemon yellow Ferro orange yellow Ferro yellow Greenockite Orange cadmium Pigment orange 20 Pigment yellow 37... 

Barium yellow n. Pigment known also as barium chromate, barium chrome, or lemon yellow. It is essentially barium chromate made by adding a solution of sodium dichromate to barium chloride solution. Ash M, Ash I (1998) Handbook of fillers, extenders and dilutents. Synapse Information Resources Inc., New York. 

---