Ortho Phosphoric Acid for HPLC | 7664-38-2

Ortho Phosphoric Acid for HPLC | CAS No. 7664-38-2:

Ortho Phosphoric Acid for HPLC is a high-purity, analytical-grade chemical widely used in chromatographic and laboratory applications. This clear, viscous liquid is highly effective as a reagent in High-Performance Liquid Chromatography (HPLC) due to its excellent solubility and low level of contaminants. It dissolves readily in water, forming a clear and colorless solution—essential for precise and interference-free analysis.

With a minimum assay of 85%, this phosphoric acid ensures consistent performance in sensitive testing environments. The specific gravity at 25°C is approximately 1.70 g/mL, making it stable and reliable for standard laboratory conditions. Its extremely low levels of chloride, sulfate, iron, and heavy metals ensure it meets strict analytical purity standards.

Beyond analytical labs, Ortho Phosphoric Acid is also employed in buffer solutions, pH adjustments, and as a reagent in biochemical preparations. The compound is highly stable and offers consistent quality, making it a trusted choice for professionals in research and development settings.

Hazards & Safety Information

Hazard Statements:

• Harmful if swallowed

• May be corrosive to metals

• Causes severe skin burns and eye damage

• Harmful to terrestrial vertebrates

Handling Classification:

• IMDG: 8/III

• UN Number: 1805

• IATA Classification: 8

Appropriate protective gear, proper ventilation, and standard lab safety protocols should always be followed when handling this product.

Product Features

• CAS Number: 7664-38-2

• Molecular Formula: H₃PO₄

• Molecular Weight: 98.00 g/mol

• Appearance: Clear, viscous liquid (≤10 Hazen units)

• Assay (Minimum): 85.0%

• Specific Gravity (25°C): ~1.70 g/mL

• Solubility: Miscible with water, forming a clear solution

• Chloride (Cl⁻): ≤ 0.002%

• Sulphate (SO₄²⁻): ≤ 0.01%

• Iron (Fe): ≤ 0.001%

• Heavy Metals (Pb): ≤ 0.002%

• UV Absorbance (1 M solution):

  • 210 nm: 0.07

  • 220 nm: 0.05

  • 230 nm: 0.04

  • 250 nm: 0.04

  • 500 nm: 0.02

• IMDG Code: 8/III

• UN Number: 1805

• IATA Classification: 8