top of page
Basic Information

 

Item Details
Product Name Phosphoric Acid
Synonym Orthophosphoric Acid
CAS No. 7664-38-2
EINECS No. 231-633-2
Molecular Formula H₃PO₄
Molecular Weight 97.99
Appearance Colorless, transparent viscous liquid
Concentration Specification 75%, 85%
Grade Classification Food Grade, Industrial Grade
Density (85%, 20℃) 1.685 g/mL
Density (75%, 20℃) 1.570 g/mL
Executive Standard Food Grade: FCC, GB 3149; Industrial Grade: GB/T 2091
Certifications ISO9001, HALAL, KOSHER
Heavy Metal (Pb) ≤ 0.001%
Fluoride Content Compliant with international standard limits

 

Product Overview 

Phosphoric Acid (Orthophosphoric Acid) is a colorless, transparent, viscous inorganic liquid acid, available in two mainstream concentrations of 75% and 85%, covering complete specifications of food grade and industrial grade. As a core phosphate raw material, it is widely used as a high-efficiency food acidulant and pH stabilizer in beverage and food processing, and acts as a key industrial intermediate for phosphate synthesis, fertilizer manufacturing, water treatment and metal surface treatment.

Character

Phosphoric Acid possesses stable chemical properties, high purity, and extremely low impurity content. It is non-volatile with mild and controllable acidity compared with other strong inorganic acids. Food grade specifications undergo strict purification processes, meeting global food safety certification standards for safe food additive application. Industrial grade features stable acidity and excellent chelating performance, suitable for mass industrial production. Dual concentrations of 75% and 85% fully adapt to diverse food processing and industrial manufacturing demands with consistent batch quality.

 

Main Functions

1.Food Acidulant & Flavor Optimizer — adjusts food and beverage acidity, optimizes taste balance and sensory flavor

2.pH Stabilizer — maintains stable pH value of finished products, inhibits bacterial growth and extends shelf life

3.Metal Chelating Agent — binds excess metal ions to prevent product oxidation, discoloration and deterioration

4.Phosphate Synthetic Intermediate — fundamental raw material for manufacturing various phosphate salt products

5.Industrial Pickling & Cleaning Agent — removes metal rust, oxide scale and surface impurities efficiently

6.Water Treatment Regulator — adjusts water pH, inhibits pipeline scaling and equipment corrosion

 

Applications

1.Food & Beverage Industry: Food grade 85% phosphoric acid is widely used in carbonated drinks, functional beverages, jams, candies and dairy products for acidity adjustment, flavor improvement and quality stabilization.

2.Phosphate & Fertilizer Manufacturing 75% and 85% industrial grade phosphoric acid serves as the primary raw material for producing sodium phosphate, potassium phosphate, ammonium phosphate and agricultural compound fertilizers.

3.Industrial Water Treatment Applied in circulating water, boiler water and industrial wastewater systems for pH regulation, scale inhibition and anti-corrosion treatment.

4.Metal Surface Treatment Used for metal pickling, rust removal, surface passivation and industrial equipment deep cleaning.

5.Fine Chemical Industry Applied in chemical synthesis, ceramic glaze processing and industrial fine cleaning scenarios.

 

Packaging & Storage

Packaging: 35L/200L plastic drum, 1000L IBC tank, ISO tank bulk shipment, customized packaging available

Storage: Store in cool, dry, ventilated warehouse, keep sealed, isolate from alkaline substances and strong oxidants

Shelf Life: 24 months under standard storage conditions

 

 

CERTIFICATE OFANALYSIS

PRODUCT: Phosphoric Acid 85%Min Food Grade

Conforms to: GB1886.15-2015

PROPERTY

UNITS

SPECIFICATIONS

TEST RESULTS

 

Appearance

 

/

Transparent

colorlessSticky    liquid

 

Pass

Assay as(H3PO4)

%

≥85.0

 

85.2

Arsenic as As

mg/kg

≤0.5

<0.2

Fluoride as F

mg/kg

≤10

<5

Heavy metals as Pb

mg/kg

≤5

<3

Reductive Matter as H3PO3

%

≤0.012

0.008

 

CERTIFICATE OF ANALYSIS 

Product: Phosphoric Acid 75%

Grade: Tech grade

Conforms to: GB1886.15-2015

PROPERTY

UNITS

SPECIFICATIONS

TEST RESULTS

Appearance

/

Transparent colorless Sticky    liquid

 

Pass

Assay as(H3PO4)

%

≥75.0

 

75.2

Arsenic as As

mg/kg

≤0.5

<0.2

Heavy metals as Pb

mg/kg

≤5

<3

Fluoride as F

mg/kg

≤10

<5

Reductive Matter as H3PO3

mg/kg

≤120

80

 

 

Product Name: Phosphoric acid Other Name: Phosphoric acid;Orthophosphoric acid;EVITs;WC-Reiniger;Sonac;Decon 4512;Kefo;3M Etching Liquid;C 134 (acid);C 434 (acid);C 134;C 434;Mikro Klene DF;K-etchant;SPA 2 (catalyst);SPA 2;TG 434;Ultra-Etch Gel;Uni-Etch;Ultraetch;Amberphos 54;HQ 54;Panavia Etching Agent;Conditioner 36;E 338;Total Etch;NSC 80804;Etchalite;Kerr Etchant;Y 11A06;Ultradent;K Etchant Gel;Acidum phosphoricum;Vococid;PC 400;SF 1;SF 1 (acid);28602-75-7;178560-73-1;959699-83-3;1021417-41-3;1053657-23-0;1196963-54-8;1643589-98-3;2055242-58-3
CAS No.: 7664-38-2 UN No.: 1805
Molecular Formula: H3O4P InChIKeys: InChIKey=NBIIXXVUZAFLBC-UHFFFAOYSA-N
Molecular Weight: 97.99520 Exact Mass: 98.00
EC Number: 231-633-2 UNII: E4GA8884NN
ICSC Number: 1008 NSC Number: 80804
UN Number: 1805|3453 DSSTox ID: DTXSID5024263
NCI Thesaurus Code: C47670 Color/Form: Unstable orthorhombic crystals or clear syrupy liquid|Colorless, sparkling liquid or transparent, crystalline solid, depending on concentration and temperature. At 20 °C the 50% and 75% strengths are mobile liquids, the 85% is of syrupy consistency; the 100% acid is in the form of crystals.|Colorless viscous liquid|Thick, colorless crystalline solid [Note: Often used in an aqueous solution]
HScode: 2809201900 Categories: Food Antioxidants
PSA: 87.57000 XLogP3: -0.9286
Appearance: Transparent liquid Density: 3 @ Temp: 18 °C”>1.834 g/cm3 @ Temp: 18 °C
Melting Point: 42.35 °C Boiling Point: 158 °C(lit.)
Refractive Index: n20/D 1.433 Water Solubility: Miscible
Storage Conditions: Storage Room low temperature ventilation drying ,Separate storage with H Pore forming agent、caustic soda Vapor Pressure: Vapour pressure, Pa at 25°C:
Vapor Density: 3.4 (vs air) Toxicity: ADI 0 to 70 mg / kg (total phosphate content in terms of phosphorus, FAO / WHO, 2001). GRAS (FDA, § 182.1073, 2000). LD501530mg / kg (rat, oral). In case of daily intake of 2 ~ 4 g, it can cause mild diarrhea. The amount of sour agent used as a cola drink is 0.02% to 0.06%.
Flammability characteristics: Noncombustible Solid Odor: Odorless
Taste: Acid taste PH: pH = 1.5 (0.1 N aqueous solution)
Dissociation Constants: pK1: 2.15; pK2: 7.09; pK3: 12.32 Experimental Properties: PH: 2.0-2.2 /DETERMINED IN 1% SOLN AND IN 10-50% SLURRIES OF INSOL COMPOUNDS/|IT FORMS 3 SERIES OF SALTS: PRIMARY PHOSPHATES; DIBASIC PHOSPHATES; AND TRIBASIC PHOSPHATES.|Easily supercooled into a glass; Heat of formation (crystalline): -306.2 Kcal/mol; Heat of solution: +2.79 Kcal/mol.|Acid containing about 88% orthophosphoric acid will frequently crystallize on prolonged cooling, forms hemihydrate; becomes anhydrous at 150 °C, gradually changes to pyrophosphoric acid at about 200 °C; above 300 °C, metaphosphoric acid; hot concentrated acid attacks porcelain and granite ware.|For more Other Experimental Properties (Complete) data for PHOSPHORIC ACID (9 total), please visit the HSDB record page.
Air and Water Reactions: Soluble in water with small release of heat. Reactive Group: Acids, Weak
Reactivity Profile: PHOSPHORIC ACID reacts exothermically with bases. May react with active metals, including such structural metals as aluminum and iron, to release hydrogen, a flammable gas. Can initiate the polymerization of certain classes of organic compounds. Reacts with cyanide compounds to release gaseous hydrogen cyanide. May generate flammable and/or toxic gases in contact with dithiocarbamates, isocyanates, mercaptans, nitrides, nitriles, sulfides, and strong reducing agents. Forms explosive mixture with nitromethane. Reacts violently with sodium tetrahydroborate. In the presence of chlorides can corrode stainless steel to form explosive hydrogen gas. Emits toxic and irritating fumes of oxides of phosphorus when heated to decomposition [Lewis, 3rd ed., 1993, p. 1029]. Autoignition Temperature: Not flammable (USCG, 1999)
Flammable Limits: Noncombustible Solid Corrosivity: Corrosive to ferrous metals and alloys

Classification of the substance or mixture

Skin corrosion, Sub-category 1B

GHS label elements, including precautionary statements

Pictogram(s)
Signal word

Danger

Hazard statement(s)

H314 Causes severe skin burns and eye damage

Precautionary statement(s)
Prevention

P260 Do not breathe dust/fume/gas/mist/vapours/spray.

P264 Wash … thoroughly after handling.

P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…

Response

P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P363 Wash contaminated clothing before reuse.

P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.

P316 Get emergency medical help immediately.

P321 Specific treatment (see … on this label).

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Storage

P405 Store locked up.

Disposal

P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

Other hazards which do not result in classification

no data available

Precautions for safe handling

NO contact with incompatible materials: See Chemical Dangers Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Dry. Well closed. Separated from food and feedstuffs and incompatible materials. See Chemical Dangers. Ventilation along the floor.Store in cool, dry, well-ventilated location. Separate from alkalies and most metals.