Lead chromate

Description

Lead chromate is an orange or orange-yellowcrystalline solid or powder. Molecular weight = 323.19;546.38 (lead chromate oxide); Boiling point = (decom-poses);Freezing/Melting point = 844℃. HazardIdentification (based on NFPA-704 M Rating System):Health 3, Flammability 0, Reactivity 0. Insoluble in water.

Chemical properties

Lead chromate is an orange or orange-yellow crystalline solid or powder.

The Uses of Lead chromate

Lead chromate (PbCrO4) is found in nature as yellow crystals in the mineral crocoite. It can be produced by reacting lead chloride and sodium dichromate. It is a popular and safe yellow pigment.

The Uses of Lead chromate

It is used in chemical analysis of organic substances. pigment for paints and inks; in oil and water colors; printing fabrics, decorating china and porcelain; in chemical analysis of organic substances; in traffic paints.

The Uses of Lead chromate

Lead chromate, “chrome yellow” PbCrO4, yellow precipitate, by reaction of soluble lead salt solution and sodium dichromate or chromate solution.Used as a pigment; basic lead chromate, red solid, insoluble, formed by heating lead chromate and sodium hydroxide solution.

What are the applications of Application

Lead(II) chromate is A highly toxic chromate of lead

Definition

ChEBI: A chromium coordination entity comprising chromate and lead(2+) ions in a 1:1 ratio

Health Hazard

Lead chromate is a suspected human lung carcinogen and can cause chronic lead poisoning.

Potential Exposure

Lead chromate is used to make paint pigments for wood and metal

First aid

If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seekmedical attention immediately. If this chemical contactsthe skin, remove contaminated clothing and wash immedi-ately with soap and water. Seek medical attention immedi-ately. If this chemical has been inhaled, remove fromexposure, begin rescue breathing (using universal precau-tions, including resuscitationmask) if breathing hasstopped and CPR if heart action has stopped. Transferpromptly to a medical facility. When this chemical hasbeen swallowed, get medical attention. Give large quanti-ties of water and induce vomiting. Do not make an uncon-scious person vomit.Antidotes and special procedures for lead: Persons with sig-nificant lead poisoning aresometimestreated with CaEDTA while hospitalized. This“chelating” drug causes arush of lead from the body organs into the blood and kid-neys, and thus has its own hazards, and must be adminis-tered only by highly experienced medical personnel undercontrolled conditions and careful observation. Ca EDTA orsimilar drugs should never be used to prevent poisoningwhile exposure continues or without strict exposure control,as severe kidney damage can result.Note to physician: For severe poisoning BAL [BritishAnti-Lewisite, dimercaprol, dithiopropanol (C3HgOS2)] hasbeen used to treat toxic symptoms of certain heavy metalspoisoning. In the case of lead poisoning it may haveSOME value. Although BAL is reported to have a largemargin of safety, caution must be exercised, because toxiceffects may be caused by excessive dosage. Most can beprevented by premedication with 1-ephedrine sulfate(CAS: 134-72-5).

storage

Color Code- Blue: Health Hazard/Poison: Storein a secure poison location. Prior to working with thischemical you should be trained on its proper handling andstorage. I ead chromate must be stored to avoid contactwith oxidizers (such as perchlorates, peroxides, permanga-nates,chlorates, and nitrates) andchemically active metals(such as potassium, sodium, magnesium, zinc and ferricferrocyanide), since violent reactions occur. A regulated,marked area should be established where this chemical is handled,used, or stored in compliance with OSHAStandard 1910. 1045.

Shipping

UN3085 Oxidizing solid, corrosive, n.o.s, Hazard Class: 5.1; Labels: 5.1-Oxidizer, 8-Corrosive material, Technical Name Required.

Incompatibilities

Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides, and active metals; hydrazine, sodium, and potassium; organics at elevated temperature. Reacts with aluminum dinitronaphthalene, iron(III) hexacyanoferrate (IV)