Bleichromat

Bezeichnung:Bleichromat

CAS-Nr7758-97-6

Englisch Name:Lead chromate

CBNumberCB0347028

SummenformelCrO4Pb

Molgewicht323.19

MOL-Datei7758-97-6.mol

Synonyma

Bleichromat

Chromsaures Blei

Bleichromat physikalisch-chemischer Eigenschaften

Schmelzpunkt	844°C
Dichte	6,3 g/cm³
Löslichkeit	soluble in alkaline solutions, dilute acid solutions
Aggregatzustand	powder
Farbe	Yellow
Wasserlöslichkeit	Insoluble. <0.1 g/100 mL at 19 ºC
Merck	14,5405
Expositionsgrenzwerte	ACGIH: TWA 0.0002 mg/m3; TWA 0.05 mg/m3; STEL 0.0005 mg/m3 OSHA: Ceiling 0.1 mg/m3 NIOSH: IDLH 100 mg/m3; IDLH 15 mg/m3; TWA 0.0002 mg/m3; TWA 0.050 mg/m3
Stabilität	Stable. Reacts violently with ferric ferrocyanide.
InChI	InChI=1S/Cr.4O.Pb/q;;;2*-1;+2
InChIKey	MOUPNEIJQCETIW-UHFFFAOYSA-N
SMILES	[Cr]([O-])([O-])(=O)=O.[Pb+2]
CAS Datenbank	7758-97-6(CAS DataBase Reference)
EPA chemische Informationen	Lead(II) chromate (7758-97-6)

Sicherheit

Kennzeichnung gefährlicher	T,N
R-Sätze:	61-33-40-50/53-62-45
S-Sätze:	53-45-60-61
RIDADR	UN 3077 9/PG 3
WGK Germany	3
RTECS-Nr.	GB2975000
TSCA	TSCA listed
HazardClass	6.1
PackingGroup	III
Speicherklasse	6.1D - Non-combustible acute toxic Cat.3 toxic hazardous materials or hazardous materials causing chronic effects
Hazard Classifications	Aquatic Acute 1 Aquatic Chronic 2 Carc. 1A Repr. 1A STOT RE 2
Giftige Stoffe Daten	7758-97-6(Hazardous Substances Data)

Gefahreninformationscode (GHS)

Lead chromate Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD
GELBES BIS ORANGE- GELBES KRISTALLINES PULVER
CHEMISCHE GEFAHREN
Zersetzung beim Erhitzen unter Bildung giftiger Rauche mitBleioxiden. Reagiert mit starken Oxidationsmitteln wie Wasserstoffperoxid. Reagiert mit Aluminium-dinitronaphthalin, Eisen(III)-hexacyanoferrat(IV). Reagiert mit organischen Stoffenbei erhöhter Temperatur, Feuergefahr!
ARBEITSPLATZGRENZWERTE
TLV: (als Blei) 0.05 mg/m?(als TWA); Krebskategorie A2 (Verdacht auf krebserzeugende Wirkung beim Menschen); BEI vorhanden TLV: (als Chrom) 0.012 mg/m?(als TWA); Krebskategorie A2 (Verdacht auf krebserzeugende Wirkung beim Menschen); (ACGIH 2005).
MAK: Krebserzeugend Kategorie: 3B; (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation des Aerosols und des Staubs sowie durch Verschlucken.
INHALATIONSGEFAHREN
Verdampfung bei 20°C vernachlässigbar; eine gesundheitsschädliche Partikelkonzentration in der Luft kann jedoch schnell erreicht werden beim Versprühen oder Dispergieren, vor allem als Pulver.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION:
Die Substanz reizt die Atmungsorgane.
LECKAGE
Verschüttetes Material aufsaugenoder in Behältern sammeln; falls erforderlich durch Anfeuchten Staubentwicklung vermeiden. Reste sorgfältig sammeln. An sicheren Ort bringen. NICHT in die Umwelt gelangen lassen. Persönliche Schutzausrüstung: Atemschutzgerät, P3-Filter für giftige Partikel.
R-Sätze Betriebsanweisung:
R61:Kann das Kind im Mutterleib schädigen.
R33:Gefahr kumulativer Wirkungen.
R40:Verdacht auf krebserzeugende Wirkung.
R50/53:Sehr giftig für Wasserorganismen, kann in Gewässern längerfristig schädliche Wirkungen haben.
R62:Kann möglicherweise die Fortpflanzungsfähigkeit beeinträchtigen.
S-Sätze Betriebsanweisung:
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S60:Dieses Produkt und sein Behälter sind als gefährlicher Abfall zu entsorgen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
Chemische Eigenschaften
Lead chromate is an orange to orange-yellow crystalline solid or powder. It is soluble in strong inorganic acids and alkalis but insoluble in water and oils. It exhibits high tinting strength and excellent covering power, with no chalking under atmospheric conditions. However, its color darkens upon prolonged exposure to sunlight and readily blackens when exposed to hydrogen sulfide gas. The exact hue can vary depending on the ratios of raw materials and manufacturing conditions. The product range includes five types: Lemon Chrome Yellow, Pale Chrome Yellow, Medium Chrome Yellow, Deep Chrome Yellow, and Orange Chrome Yellow. Warning: It is highly toxic.
Verwenden
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.
Verwenden
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.
Verwenden
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.
Definition
ChEBI: Lead chromate is a chromium coordination entity comprising chromate and lead(2+) ions in a 1:1 ratio It has a role as a carcinogenic agent and a nephrotoxic agent. It is a lead coordination entity and a chromium coordination entity. It contains a lead(2+) and a chromate(2-).
Health Hazard
Lead chromate is a suspected human lung carcinogen and can cause chronic lead poisoning.
mögliche Exposition
Lead chromate is used to make paint pigments for wood and metal
Erste Hilfe
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).
Lager
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.
Versand/Shipping
UN3085 Oxidizing solid, corrosive, n.o.s, Hazard Class: 5.1; Labels: 5.1-Oxidizer, 8-Corrosive material, Technical Name Required.
Inkompatibilitäten
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)
Einzelnachweise
[1] FERGUSON W S. Lead Chromate[J]. Science, 1981, 214 4516. DOI:10.1126/science.214.4516.8.c.
[2] SHIBEN LIU Bin C Jinhua Zhan. Enriching Oxidation Sites-Based Facets in Lead Chromate to Boost Photoelectrochemical Sensing Response[J]. Small, 2025, 21 8. DOI:10.1002/smll.202408680.
[3] HAN GAO . Effect of low molecular weight organic acids on the lead and chromium release from widely-used lead chromate pigments under sunlight irradiation[J]. Environmental Pollution, 2023, 337: Article 122553. DOI:10.1016/j.envpol.2023.122553.

Lead chromate Upstream-Materialien And Downstream Produkte

Bleichromat Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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