Guanidine phosphate

I. Basic Chemical Information

1. Molecular Formula and Structure

CAS No.: 5423-23-4

Chemical Formula: C(NH2)3·H3PO4

EINECS No.: 226-551-9;217-176-1

Molecular Weight: 216.14

Structural Features: A salt compound formed by the acid-base neutralization of guanidine (a strong organic base) with phosphoric acid. Its crystal structure is based on ionic bonds between phosphate radicals and protonated guanidinium cations

2. Physical Properties

Appearance: White crystalline or powdered solid, odorless

Melting Point: approx. 245℃ (decomposition)

Solubility: Easily soluble in water (solubility approx. 50g/100mL at 25℃), slightly soluble in ethanol, insoluble in nonpolar solvents

Hygroscopicity: Highly hygroscopic, requires sealed storage

3. Chemical Properties

Aqueous solution is weakly alkaline (pH 8-9), decomposes at high temperatures to produce ammonia, phosphates, and other products

Reacts with strong acids to release guanidyl groups and forms complexes with metal ions (e.g., Ca²⁺, Mg²⁺)

II. Main Application Areas

1. Flame Retardant Materials

Mechanism of Action: Decomposes at high temperatures to produce phosphoric acid, promoting char formation of the substrate and isolating oxygen

Application Scenarios: Added to polyurethane foams, textiles, and wood coatings, meeting environmental flame retardant standards (e.g., UL94 V-0 grade)

2. Medicine and Biochemistry

Drug Synthesis: Used as an intermediate for antihypertensive drugs and antiviral drugs (e.g., Lopinavir)

Protein Denaturant: Used in laboratories for extracting nucleic acids or denaturing proteins

3. Agricultural Efficiency Enhancement

Fertilizer Additive: Enhances crop absorption efficiency of nitrogen and phosphorus

Pesticide Adjuvant: Compounded with herbicides to improve foliar adhesion and penetration capabilities

4. Industrial Field

Metal Treatment: Used as a complexing agent in electroplating solutions to improve coating uniformity

Resin Modification: Epoxy resin curing accelerator, shortens hardening time

III. Quality Standards: