City Chemical LLC manufactures Ammonium Iodide (NH4I, CAS 12027-06-4) to ACS reagent grade, supplied as a white crystalline solid that is soluble in both water and alcohol. It sublimes upon decomposition rather than melting cleanly, a property consistent with its measured vapor pressure. Ammonium Iodide is used in the preparation of collodion, a cellulose-nitrate solution long used as a coating and binder in photographic and specialty laboratory applications, and as a catalyst for dithioacetalization reactions in organic synthesis.
City Chemical LLC is a privately-held, woman-owned chemical manufacturer headquartered in West Haven, Connecticut. Backed by more than a century of combined operating history, we specialize in rare, unusual, and hard-to-find chemicals that are difficult to source elsewhere. Every order is backed by our ResponseAbilityTM commitment — a dedication to speed, accuracy, and responsiveness at every stage of the chemical purchasing process. Whether you need a small lab-scale quantity or a large industrial order, our team works to deliver the exact specification, packaging, and turnaround your project requires.
Ammonium Iodide: Chemical Properties and Specifications
| Property / Specification | Detail |
|---|---|
| Appearance | White crystalline |
| Grade | ACS Reagent Grade |
| Purity | 99% min. |
| Melting Point | 551°C |
| pH | 4.5-6.5 (50 g/L, 25°C) |
| Vapor Pressure | 1 hPa (1 mmHg) at 210.9°C |
| Relative Density | 2.514 g/cm3 |
| Solubility | Soluble in water and alcohol |
| Molecular Formula | NH4I |
| Formula Weight | 144.94 g/mol |
| CAS Number | 12027-06-4 |
| EC Number | 234-717-7 |
| GHS Classification | Warning. Skin irritation, Category 2 (H315); serious eye irritation, Category 2A (H319); specific target organ toxicity, single exposure, Category 3, respiratory system (H335). |
| Transport (DOT/IMDG/IATA) | Not dangerous goods |
| Product Number | A3088 |
Common Uses & Applications: preparation of collodion for photographic and laboratory coating applications, catalyst for dithioacetalization reactions in organic synthesis, and general laboratory reagent and manufacturing-intermediate use.
Ammonium Iodide for Organic Synthesis and Specialty Photography
Ammonium Iodide supplies iodide ion in a stable, easy-to-weigh solid form, which is what makes it useful as a catalyst in dithioacetalization — a standard protecting-group step in organic synthesis where a ketone or aldehyde is converted to a dithioacetal. Its role in collodion preparation draws on a different property entirely: collodion chemistry has a long history in photographic and laboratory work, and ammonium iodide is one of the classic additives used in formulating it.
As an Ammonium Iodide manufacturer, City Chemical LLC supplies synthesis chemists and specialty photographic chemists who need a documented ACS-grade reagent. A Certificate of Analysis accompanies every order, confirming assay and the trace-impurity limits that both synthesis and formulation work depend on.
Why Choose City Chemical?
Benefits of Choosing City Chemical Over Other Chemical Manufacturers
- Ammonium Iodide, ACS Reagent Grade, available for qualified chemical buyers
- Lot-specific Certificate of Analysis with every order
- Flexible packaging options, from small quantities to larger requirements
- U.S.-based sourcing and support from West Haven, Connecticut
- Experience serving research, industrial, aerospace, military, and semiconductor markets
- Responsive customer service from a knowledgeable chemical supply team
- A broad catalog of rare, unusual, and hard-to-find chemicals
Responsive Chemical Sourcing and Custom Packaging
At City Chemical, ResponseAbilityTM is our commitment to giving every customer a faster, more reliable chemical purchasing experience — from first inquiry through final delivery. Ammonium Iodide should be kept away from air during storage, and we package it accordingly to protect the material and preserve an accurate specification from the time it leaves our facility to the time it reaches your lab.
We offer custom packaging tailored to your process, whether you need a small quantity for bench-scale synthesis work or larger volumes for production use.
Quality Backed by More Than a Century of Experience
City Chemical’s reputation is built on more than a century of combined experience supplying rare and high-purity chemicals to demanding industries. As a U.S.-based manufacturer, we support reshoring and supply-chain resilience, helping customers reduce risk and transit time while maintaining the strict quality standards our customers expect on every order.
Whether you are running a dithioacetalization step, formulating collodion for specialty photographic work, or sourcing an iodide reagent for another synthesis, City Chemical is ready to be your trusted source for Ammonium Iodide.
Order Ammonium Iodide
Ready to source Ammonium Iodide for your next project? Contact City Chemical LLC today to request a quote, discuss packaging options, or ask a technical question. Our knowledgeable team is standing by to help you get the exact specification you need, delivered on your timeline.