Chemical Name : Phosphoric Acid 85%Min.
Formula : H3PO4
Grades : Food Grade and Technical Grade
Cas No. : 7664-38-2
UN No. : UN1805
Package : 35Kg/Jerrycan
Origin : China, S.Korea…
Category : Textile Dyeing, Beverages, Waste Water Treatment, Mining Industry…
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Phosphoric Acid 85% (H₃PO₄) is a versatile, moderately strong mineral acid widely used as a pH adjuster, descaler, rust remover, and cleaning agent. Due to its controlled acidity and low corrosiveness compared to HCl or H₂SO₄, it is preferred in many industrial processes, including textiles.
Phosphoric acid is used to neutralize alkaline residues after:
Reactive dyeing
Vat dyeing
Sulphur dyeing
Mercerization washing
Benefits:
Stable, controlled pH reduction
Prevents re-alkalization of fabric
Minimizes shade variation and improves fastness
Widely used for cleaning:
Dyeing machines
Pipelines
Heat exchangers
Pumps and nozzles
Functions:
Removes limescale (CaCO₃ deposits)
Dissolves iron oxide (rust)
Safe for most metals when diluted properly
Phosphoric acid binds metal ions such as calcium and magnesium, improving:
Dye bath stability
Shade reproducibility
Water quality
Helps neutralize residual alkali, preventing:
Yellowing during drying
Oxidation browning
Fiber degradation
Phosphoric acid acts as:
A pH buffer in finishing baths
A catalyst in certain resin finishing agents
A neutralizer in softener formulations
Used for:
pH adjustment before coagulation
Neutralization of alkaline streams
Precipitation of metals
Enhancing flocculation performance
Dosage varies by fabric, process, and required pH.
Neutralization after dyeing: 0.5–3 g/L
Machine descaling: 1–5% solution
Metal removal (chelating): 0.1–0.5 g/L
Wastewater pH adjustment: based on influent alkalinity
Strong but controlled acid – safer than HCl or H₂SO₄
Non-fuming and less corrosive
Excellent scale- and rust-removal properties
Highly effective pH stabilizer
Suitable for automated dosing systems
(Not applicable for industrial 85% unless specified food grade)
Acidulant, flavor enhancer
pH control in beverages, jams, cheese
Used in sweeteners production
Scale remover in industrial cleaning
Rust cleaner formulations
Dishwasher chemicals
Metal pre-treatment solutions
pH control in boiler and cooling systems
Scale control agent
Precipitation of calcium and magnesium
Rust removal
Metal pickling
Phosphate coating preparation
Manufacturing of ammonium phosphate fertilizers
pH adjustment in irrigation systems
Nutrient additive in hydroponics
(Only food/pharma grade)
Buffering agent
Toothpaste and oral care formulations
Corrosive — avoid skin and eye contact
Store in plastic (HDPE) tanks only
Keep away from strong oxidizers and bases
Use protective gloves, goggles, and apron
NGHI SON CHEMICALS IMPORT EXPORT COMPANY LIMITED
Head office:
P7-38.OT09 ("Officetel") Vinhomes Central Park, 720A Dien Bien Phu Street, Thanh My Tay Ward, Ho chi minh city, Vietnam 70000
License/Tax Code : 0312824002
Tel: +84-28-36208490
Fax : +84-28-36208492
Website: https://www.nghisonchemical.com
Email : Nghisonchem@nghisonchemical.com
Nscchem@nghisonchemical.com
Nghisonchem@gmail.com
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Warehouse No.1 :
No. 7 Street, Hai Son IP, Duc Hoa Ha Commune, Duc Hoa Ward, Long An Province
Warehouse No.2 :
Lot D, No.6-8 Street, Song Than IP, Di An Ward, Hochiminhcity, Vietnam
Warehouse No.3 :
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