Introduction
If you’re working in agriculture, electronics, or chemical research, chances are you’ve come across Ammonium Dihydrogen Phosphate MAP CAS 7722-76-1. This versatile compound plays a critical role in a wide range of applications—from fertilizers and flame retardants to optical crystals and buffer solutions. In this guide, we’ll break down what MAP is, where it’s used, and why it matters. Whether you’re a researcher or an industry professional, this post will give you the essential insights you need about MAP.
What is Ammonium Dihydrogen Phosphate (MAP)?
Ammonium Dihydrogen Phosphate, also known as Monoammonium Phosphate (MAP), is a white crystalline powder with the chemical formula NH₄H₂PO₄.
- CAS Number: 7722-76-1
- Molecular Weight: 115.03 g/mol
- Solubility: Highly soluble in water
- pH: Slightly acidic in aqueous solutions
This compound is known for its stability, non-hygroscopic nature, and ease of handling, making it suitable for multiple industrial and scientific applications.
Key Applications of MAP CAS 7722-76-1
1. Agriculture: Fertilizer Use
MAP is one of the most popular phosphorus fertilizers worldwide. It provides a rich source of phosphorus (P) and nitrogen (N)—both essential nutrients for plant growth.
Benefits in agriculture:
- Enhances root development
- Increases crop yield
- Ideal for acidic soils due to its neutralizing effect
- Compatible with other fertilizers
Typical formula: 11-52-0 (11% Nitrogen, 52% Phosphorus, 0% Potassium)
2. Fire Protection and Flame Retardants
Ammonium Dihydrogen Phosphate is a key component in dry chemical fire extinguishers, especially those designed for Class A, B, and C fires.
- Decomposes to form phosphoric acid, which creates a fire-retardant layer
- Commonly used in ABC powder fire extinguishers
- Environmentally safer compared to halogenated fire suppressants
3. Electronics and Optics
In the electronics and laser industry, MAP is valued for its optical properties.
- Used to grow single crystals like ADP and KDP
- Essential in non-linear optics (NLO) for frequency conversion of lasers
- Helps in the manufacture of piezoelectric and electro-optic devices
4. Industrial and Laboratory Use
Ammonium Dihydrogen Phosphate MAP CAS 7722-76-1 serves as a reliable reagent and buffer component.
- Acts as a pH buffer in biochemical and pharmaceutical research
- Used in yeast culture media and fermentation processes
- Important in ceramics and metal treatment as a fluxing agent
Properties and Safety Considerations
Physical and Chemical Properties
| Property | Details |
|---|---|
| Appearance | White crystalline powder |
| Odor | Odorless |
| Melting Point | 190 °C (decomposes) |
| Solubility in Water | 400 g/L at 20 °C |
| Stability | Stable under normal conditions |
Safety and Handling
- Non-toxic but can cause mild irritation to skin or eyes
- Store in a cool, dry place away from strong oxidizers
- Use PPE (gloves, goggles) when handling in bulk
Tip: Always consult the Material Safety Data Sheet (MSDS) before use.
Advantages of Using MAP in Industry
Using Ammonium Dihydrogen Phosphate MAP CAS 7722-76-1 offers several benefits:
- High purity and consistency for research-grade applications
- Excellent water solubility, ideal for foliar and drip irrigation systems
- Cost-effective and widely available
- Multi-functional: suitable for use in agrochemical, fire safety, and scientific fields
Frequently Asked Questions
Is MAP safe for the environment?
Yes. Compared to many chemical fertilizers, MAP is relatively safe when used correctly. Overuse, however, can lead to phosphorus runoff, so responsible application is key.
Can MAP be mixed with other fertilizers?
Absolutely. It’s compatible with most fertilizers except for calcium or magnesium-based compounds, which may cause precipitation.
Is there a difference between MAP and DAP?
Yes. Monoammonium Phosphate (MAP) has a lower nitrogen content than Diammonium Phosphate (DAP), making MAP more suitable for acidic soils.
Conclusion: Why MAP Matters
From supporting global food production to powering laser technology, Ammonium Dihydrogen Phosphate MAP CAS 7722-76-1 is a vital compound across industries. Its unique properties, safety profile, and versatility make it a go-to solution for scientists, engineers, and agriculturists alike.
Whether you’re sourcing it for a lab project or scaling your fertilizer production, understanding MAP gives you a definite edge.
