Ammonium Chromate – 500 gram Packs

Ammonium Chromate is an inorganic chromium(VI) salt with the chemical formula (NH₄)₂CrO₄. Also known as diammonium chromate or neutral ammonium chromate, this compound consists of ammonium cations and chromate anions and occurs as a yellow crystalline solid. It is soluble in water and exhibits oxidizing properties associated with its hexavalent chromium content. Ammonium Chromate has applications in specialized analytical chemistry, selected chemical investigations, and certain research procedures involving chromate chemistry. It may also be used in established photographic and textile-related technical processes where permitted. Its role in laboratory work requires strict attention to chemical compatibility, exposure prevention, and hazardous-waste management. Because chromium(VI) compounds present serious health and environmental hazards, Ammonium Chromate should be restricted to appropriately equipped laboratories with trained personnel and suitable risk controls. The 500 gram pack is intended for laboratory procurement where the substance is specifically required.

Product Specifications

Specification	Details
Appearance	Yellow crystalline powder
Assay	99%
Chemical Name	Ammonium Chromate
Alternate Names	Diammonium Chromate, Neutral Ammonium Chromate, Ammonium Chromate(VI), Chromic Acid Diammonium Salt
Molecular Formula	(NH₄)₂CrO₄
Empirical Formula	H₈CrN₂O₄
CAS Number	7788-98-9
Molecular Weight	152.07 g/mol
Grade	LR Laboratory Reagent

Key Features of Ammonium Chromate

• Defined inorganic composition: Contains two ammonium ions for each chromate ion, with chromium present in the +6 oxidation state.
• Characteristic yellow appearance: Forms yellow crystalline material that can be identified by its established physical characteristics.
• Water solubility: Dissolves in water, supporting selected laboratory procedures involving aqueous chromate solutions.
• Oxidizing properties: Functions as an oxidizing agent, making chemical compatibility and controlled experimental conditions essential.
• Specialized laboratory relevance: Used in selected analytical and research applications involving chromate chemistry, subject to applicable safety requirements and method specifications.

Laboratory Applications of Ammonium Chromate

• Analytical chemistry: Used in selected procedures involving chromate ions and chromium(VI) chemistry when the prescribed method specifically requires this reagent.
• Inorganic chemistry research: Supports controlled investigations of chromate salts, oxidation-reduction behaviour, and related inorganic reactions in appropriately equipped laboratories.
• Qualitative chemical investigations: May be used in established reactions involving chromate ions under a documented experimental procedure and appropriate containment controls.
• Specialized photographic research: Has documented use in certain historical and technical processes involving light-sensitive gelatin coatings; current use must comply with relevant safety and environmental requirements.
• Materials and corrosion studies: Can be relevant to specialized investigations of chromate chemistry and corrosion-inhibition processes where its use is specifically justified and legally permitted.

Why Choose Lab Wale to Buy Ammonium Chromate

Lab Wale provides a sourcing option for laboratory chemicals and scientific supplies required by educational institutions, research centres, analytical laboratories, and technical organizations. When purchasing Ammonium Chromate, laboratories should verify the chemical identity, stated grade, pack size, and applicable safety information before ordering. The 500 gram pack can support institutional procurement where this specific chromium(VI) compound is required. Given its significant health and environmental hazards, buyers should ensure that suitable handling facilities, trained personnel, and authorized waste-management arrangements are available before purchase and use.

Frequently Asked Questions About Ammonium Chromate

What is Ammonium Chromate used for in laboratories?

Ammonium Chromate is used in selected analytical chemistry procedures, chromate reaction studies, and specialized inorganic research. It also has documented applications in certain photographic and corrosion-related technical processes. Its use should be limited to situations where the reagent is specifically required and appropriate exposure and environmental controls are in place.

What are the chemical formula and molecular weight of Ammonium Chromate?

The molecular formula of Ammonium Chromate is (NH₄)₂CrO₄, and its formula mass is approximately 152.07 g/mol. Its empirical formula is H₈CrN₂O₄, which cannot be simplified to a smaller whole-number ratio. The compound contains hexavalent chromium, which is central to its chemical reactivity and hazard profile.

What is the CAS number of Ammonium Chromate?

The CAS Registry Number for Ammonium Chromate is 7788-98-9. This identifier corresponds to diammonium chromate and helps distinguish it from related chromium compounds, including ammonium dichromate, which has a different chemical formula and CAS number.

Is Ammonium Chromate suitable for educational and research laboratories?

Ammonium Chromate may be appropriate for specialized research or analytical work in suitably equipped laboratories with trained personnel. It should not be treated as a routine school practical reagent because chromium(VI) compounds can cause serious health effects. Any proposed use requires a documented risk assessment, suitable containment, and compliance with applicable regulations.

What precautions are necessary when handling Ammonium Chromate?

Ammonium Chromate is an oxidizer and a hazardous chromium(VI) compound associated with serious health and environmental risks. Avoid dust generation and all unnecessary exposure. Use suitable chemical-resistant gloves, protective clothing, eye protection, and appropriate containment, such as a suitable fume hood. Prevent release to drains and follow the applicable Safety Data Sheet and hazardous-waste procedures.

Storage Conditions for Ammonium Chromate

Store Ammonium Chromate in a tightly closed, compatible, clearly labelled container in a cool, dry, well-ventilated area. Keep it segregated from combustible materials, organic substances, reducing agents, and other incompatible chemicals identified in the applicable Safety Data Sheet. Protect the material from contamination, excessive heat, and uncontrolled access. Storage arrangements should comply with applicable requirements for oxidizing and chromium(VI) compounds.

Precautions for Handling Ammonium Chromate

Review the current Safety Data Sheet and complete a documented risk assessment before handling. Use appropriate containment and chemical-resistant gloves, protective clothing, and eye protection; avoid inhalation of dust and all skin or eye contact. Because this substance can cause serious health effects and is highly hazardous to aquatic environments, prevent spills and environmental release. Do not mix it with incompatible materials. Collect residues and contaminated materials as hazardous waste under applicable regulations, and restrict handling to trained personnel.