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HCID 25466Erstellt: 27. Oktober 2026
Kaliumhydroxyoctaoxodizincatdichromat(1-)
ZINCPOTASSIUMCHROMATES · Zinc Potassium Chromate · Potassium zinc chromate hydroxide · POTASSIUM ZINC CHROMATE HYDROXIDE, as Cr · POTASSIUMHYDROXYOCTAOXODIZINCATEDICHROMATE · potassium hydroxyoctaoxodizincatedichromate(1-) · Chromate(1-), hydroxyoctaoxodizincatedi-, potassium · Potassium zinc chromate hydroxide (KZn2(CrO4)2(OH))
https://huagongshe.com/de/chemical/25466
Identifikatoren & physikalische Daten
| CAS No. | 11103-86-9 |
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| Summenformel | Cr2HO9Zn2K |
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| Durchschnittliche Molmasse | 418,9 g/mol |
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| Monoisotopische Masse | 415,66506 g/mol |
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| SMILES | [K+].[OH-].[O]=[Cr](=[O])([O-])[O-].[O]=[Cr](=[O])([O-])[O-].[Zn+2].[Zn+2] |
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| InChIKey | GQKCRUJOPUHISR-UHFFFAOYSA-M |
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| PubChem CID | 25466 |
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| EC No. | 234-329-8 |
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| DTXSID | DTXSID2026313 |
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| Lokaler Name | Kaliumhydroxyoctaoxodizincatdichromat(1-) |
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Chemische & physikalische Eigenschaften
| Polarare Oberfläche (TPSA) | 162 |
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| H-Brücken-Donoren | 1 |
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| H-Brücken-Akzeptoren | 9 |
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| Frei drehbare Bindungen | 0 |
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| Schwere Atome | 14 |
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| Formalladung | 0 |
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| Komplexität | 62,2 |
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| Stoffklassen | Metals -> Chromium Compounds, InorganicCarcinogens |
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| pH | pH = 7.5 |
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| Geruch | Odorless |
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| Dichte | 3.40 to 3.60 (USCG, 1999)3.5 g/cu cm3.5 g/cm³ |
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| Color/Form | Yellow powderGreen-to-yellow powder |
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| Löslichkeit | less than 1 mg/mL at 68 °F (NTP, 1992)In water at 20 °C, 0.5 g/L at pH 6, 1.5 g/L at pH 9Sparingly soluble in waterVery soluble in acids and ammonia salts. Slightly soluble in alkalines.Solubility in water, g/l at 20 °C: 0.5 - 1.5500mg/L at 20℃ |
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| Decomposition | When heated to decomposition it emits toxic fumes of /zinc oxide and dipotassium oxide/. |
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| Schmelzpunkt | Decomposes at about 500 °CNo melting pointdecomposes at 500 °C |
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| Physical Description | Zinc potassium chromate appears as a greenish-yellow odorless solid. used as a pigment Denser than water. Toxic by ingestion. Commonly but mistakenly called zinc chromate.Dry PowderGreenish-yellow solid[Hawley] Yellow powder that is sparingly soluble[Ullmann]GREEN-TO-YELLOW POWDER. |
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| Selbstentzündungstemperatur | 400 °C (layer)580 °C (cloud) /Basic potassium zinc chromate/ |
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| Other Experimental Properties | When heated to decomposition it emits toxic fumes of ZnO and K20. |
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| EPA chemische Informationen | Potassium zinc chromate hydroxide (11103-86-9) |
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Sicherheit & Vorschriften
| GHS-Einstufung | DangerH302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]P203, P260, P261, P264, P270, P271, P272, P273, P280, P284, P301+P317, P302+P352, P304+P340, P316, P318, P319, P320, P321, P330, P333+P317, P362+P364, P391, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 173 reports by companies from 13 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.H317: May cause an allergic skin reaction [Warning Sensitization, Skin] |
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| Regulatorische Informationen | Chemical: Chromate(1-), hydroxyoctaoxodizincatedi-, potassiumPotassium zinc chromate hydroxide (KZn2(CrO4)2(OH)) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Potassium zinc chromate hydroxide (KZn2(CrO4)2(OH)) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)R - indicates a substance that is the subject of a TSCA section 6 risk management rule.REACH registered substance: Potassium hydroxyoctaoxodizincatedichromate(1-) (EC: 234-329-8)Substance: Potassium hydroxyoctaoxodizincatedichromateZinc potassium chromate: HSNO Approval: HSR007605 Approved with controls |
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| Weitere Sicherheitsinformationen | IMAP assessments - Chromates and dichromates (insoluble): Human health tier II assessment |
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| Brandgefahren | Literature sources indicate that this compound is not flammable. (NTP, 1992)Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. |
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| Gesundheitsgefahren | INHALATION: Irritation of nasal passages and respiratory tract. EYES: Irritation. SKIN: Irritation. INGESTION: Irritation or corrosion of alimentary tract, circulatory collapse and toxic nephritis. (USCG, 1999) |
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| Gefahrenübersicht | May cause skin sensitization[eChemPortal: ERMA] See Zinc chromate. See Chromium and linked occupational diseases. |
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| Reaktive Gruppe | Salts, Basic |
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Anwendungen & Verwendung
Verwenden
Zinc potassium chromate is one of several chromates used as anticorrosive agents in the formulation of coatings and primers. Chromates are widely used as inhibitors of corrosion and rust because of their unique ability to react at the metal coating interface to inhibit corrosion, especially galvanic couple corrosion (a chemical reaction that involves electron exchange between different metals). For example, using stainless steel screws on an aluminum part provides a high potential for electron transfer (galvanic couple corrosion). Even when present in very low concentrations, chromate has the unique ability to actively suppress electron transfer at both cathodic and anodic sites when different metallic parts are in contact. Active protection against rust depends on the ability of the inhibitor to migrate to the exposed surface once the protective coating has been scratched or damaged. Inhibitors dissolve in water and migrate to the exposed surface. If the inhibitor’s solubility is too great it may be washed away, if the solubility is too low the inhibitor will have low activity. According to the literature, strontium chromate has an ideal solubility (1.06 g l-1); zinc potassium chromate has similar solubility (0.5–1.5 g l-1) and is a very effective inhibitor. No single nonchrome inhibitor tested thus far acts in this way.