Industrial Use Phosphorous Acid 99% Min H3po3 CAS No. 13598-36-2 White Crystalline Powder

• CAS No.: 13598-36-2
• Formula: H3o3p
• EINECS: 237-066-7
• Model NO.: CAS No. 13598-36-2
• Classification: Phosphorous Acid
• Appearance: Crystal
• Grade Standard: Industrial Grade;Agriculture Grade
• Acid Strength: Weak Acid
• Kind: Inorganic Acid
• Quality: Tech Grade
• Packaging: Paper Bag
• Element: Polyatomic Acid
• Oxidation: Strong Reducing Agent or Reductant
• Volatility: High Boiling Acid
• Stability: Stabilized Acid
• Port of Loading: Qingdao, Tianjin, Shanghai
• Sample: Available
• Solubility: Soluble
• Certificate: ISO, SGS, COA, MSDS
• Molecular Weight: 82
• Melting Point: 73 °C
• Density: 1.651g/Ml at 25 °C(Lit.)
• Quantity: 20-26mts for 1*20'gp
• Application: Reducing Agent, Water Treatment
• Boiling Point: 200 °C
• Mark: Customizable
• Process: Crystallized Sulfamic Acid
• Transport Package: 25kg/Bag
• Specification: 99%Min
• Trademark: Shandong Pulisi
• Origin: China; Shandong
• HS Code: 2809201900
• Production Capacity: 4000 Tons/Month

Product Description

Product Name	Phosphorous Acid TEST BASE	TEST RESULT
Appearance	White crystal	White crystal
Content(H3PO3)	98.5%min	99%
Iron(Fe)	0.005max	30ppm
Phosphate(PO4)	0.6 max	0.2
Sulfate(SO4)	0.008max	0.008
Chloride(CL)	0.01max	0.002
Examination conclusion	Qualified	0.01%

Phosphorous acid uses

Phosphorous acid is widely used as a reducing agent and nylon whitening agent, and also
serves as a raw material for phosphite salts and an intermediate in the production of
organophosphorus pesticides. It is a key feedstock for manufacturing phosphite products,
plastic stabilizers (such as dibasic lead phosphite), and organophosphorus agrochemicals.
Additionally, it acts as a stabilizer in polycarbonate production and an antioxidant for nylon
1010.

It is also applied as a chemical reagent and in water treatment processes. In analytical
chemistry, it is used for the determination of mercury, gold, silver, and lead, as well as
for reducing purposes and the detection of iodic acid, copper, and cadmium. Industrially,
phosphorous acid serves as a raw material for plastic stabilizers, synthetic fibers, and
phosphite manufacturing.

Packing	25KGS Bag	1000KGS Bag
Quantity (Without Pallet)	25MTS	20MTS
Quantity (With Pallet)	22MTS	20MTS

 

FAQ

1. Delivery Reliability & Operational Excellence
Key Features:
Strategic inventory hubs at Qingdao, Tianjin, and Longkou port warehouses with 1,000+ 
metric tons of stock available
68% of orders delivered within 15 days; urgent orders prioritized via express logistics 
channel (30% acceleration)
2. Quality & Regulatory Compliance
Certifications:
Triple-certified under REACH, ISO 9001, and FMQS standards
Compliant with global hygiene regulations; 100% customs clearance success rate for 
Russian imports
3. Transactional Security Framework
Payment Solutions:
Flexible terms: LC (sight/term), TT (20% advance + 80% upon shipment)
Specialized schemes: 90-day LC for South American markets; Middle East: 30% 
deposit + BL payment
Dispute resolution: 72-hour response protocol for order-related conflicts
4. Agile Supply Chain Infrastructure
Multimodal Logistics Network:
Air freight: 3-day delivery for propionic acid shipments to Thailand
Rail transport: Dedicated calcium formate route to Russia via Eurasian corridors
ISO TANK solutions: Direct liquid chemical shipments (e.g., propionic acid to India)
Packaging Optimization:
Flexitank technology: 12% cost reduction for ethylene glycol (vs. traditional drum 
packaging)
Construction-grade calcium formate: Moisture-resistant 25kg woven PP bags
5. Risk Mitigation Protocols
End-to-End Visibility:
Real-time GPS tracking for container shipments
Third-party inspection services at destination ports (e.g., acetic acid shipments to 
South Africa)
After-Sales Assurance:
30-day quality guarantee with replacement/refund options
Complimentary temperature monitoring loggers for reefer container shipments.

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