Description
Solvent 503
Solvent 503 is an industrial hydrocarbon solvent with a relatively heavy distillation range. Due to its combination of physical properties, relatively high flash point, and ability to dissolve hydrocarbon compounds, it is used in a variety of industrial processes and chemical formulations.
Solvent 503 is one of the well-known refinery solvents in the Iranian market and has been offered in the domestic market and on the Iran Energy Exchange in different periods.
Technical Specifications of Solvent 503
According to the analysis provided for this product, Solvent 503 has a distillation range of 210 to 295°C. This range indicates that it is a relatively heavy hydrocarbon fraction with a lower evaporation rate compared with lighter solvents.
The main technical specifications of this grade are as follows:
| Specification | Value | Test Method |
|---|---|---|
| IBP | 210°C | ASTM D86 |
| 5% Distillation | 219°C | ASTM D86 |
| 10% Distillation | 221°C | ASTM D86 |
| 20% Distillation | 223°C | ASTM D86 |
| 50% Distillation | 234°C | ASTM D86 |
| 70% Distillation | 247°C | ASTM D86 |
| 90% Distillation | 269°C | ASTM D86 |
| 95% Distillation | 280°C | ASTM D86 |
| FBP | 295°C | ASTM D86 |
| Density at 15°C | 819.9 kg/m³ | ASTM D1298 |
| Flash Point, Closed Cup | 87°C | ASTM D93 |
| Kinematic Viscosity at 37.8°C | 1.9 cSt | ASTM D445 |
| Aromatic Content | 22 wt% | ASTM D6591 |
| Sulphur | 0.58 wt% | ASTM D4294 |
| Mercaptan | 320 ppm | ASTM D3227 |
| Copper Corrosion, 3 hours | Class 1 | ASTM D130 |
| Carbon Residue | 0.02 wt% | ASTM D189 |
| Residue | 1.0 vol% | ASTM D86 |
| Loss | 1.0 vol% | ASTM D86 |
Key Characteristics of Solvent 503
Distillation Range of 210 to 295°C
One of the most important characteristics of Solvent 503 is its relatively high boiling range. Approximately 50% of the product is distilled by 234°C, while its final boiling point is approximately 295°C.
This characteristic makes Solvent 503 different from very light solvents in applications where more controlled evaporation and longer solvent residence time within a formulation are required.
Flash Point of 87°C
A flash point of 87°C is one of the notable properties of this product. This relatively high flash point is an important characteristic for industrial handling and processing.
Nevertheless, Solvent 503 remains a combustible hydrocarbon product and must be stored and handled in accordance with applicable safety requirements for flammable and combustible materials.
Aromatic Content of 22 wt%
According to the available analysis, Solvent 503 contains 22 wt% aromatic compounds. The presence of an aromatic fraction can influence the solvent’s solvency toward certain organic and resinous compounds.
Therefore, this parameter should be evaluated together with the other product specifications when selecting the solvent for paints, resins, adhesives, or other chemical formulations.
Viscosity of 1.9 cSt
The kinematic viscosity of Solvent 503 at 37.8°C is 1.9 cSt. Its relatively low viscosity contributes to suitable flow characteristics during various industrial processes.
Applications of Solvent 503
Hydrocarbon solvents are widely used across different industries as solvents, diluents, or process media. Depending on the requirements of the end user, Solvent 503 may be considered for applications such as:
✅ Paints and Coatings Industry
Solvent 503 can be used in certain paint and coating formulations as a hydrocarbon solvent and as a means of controlling evaporation behavior. Final selection should be based on the type of resin, required drying rate, and compatibility with the other formulation components.
✅ Resin and Chemical Manufacturing
The combination of its aromatic content and relatively heavy distillation range makes Solvent 503 a product that may be considered for certain resin-manufacturing processes and chemical formulations.
✅ Adhesive Industry
In some hydrocarbon-based adhesive systems, solvents with higher boiling ranges are used to control viscosity and evaporation behavior. Solvent 503 may therefore be evaluated for suitable formulations.
✅ Industrial Cleaning and Degreasing
The hydrocarbon nature of Solvent 503 allows it to be considered for certain industrial cleaning and degreasing applications involving the dissolution and removal of oily and hydrocarbon-based materials. Suitability should always be evaluated according to the surface material and the safety requirements of the process.
Why Are the Technical Specifications of Solvent 503 Important?
When purchasing industrial solvents, the product name alone is not sufficient for making an appropriate selection. Two products marketed under similar names can differ significantly in terms of distillation range, density, sulphur content, aromatic content, flash point, and residue.
For Solvent 503, several parameters should be evaluated together, including Distillation Range, Density, Flash Point, Aromatic Content, Sulphur, Mercaptan, and Viscosity.
For this reason, when purchasing or exporting Solvent 503, obtaining the COA (Certificate of Analysis) for the actual shipment is particularly important.
Packaging, Transportation, and Storage
Solvent 503 should be stored and transported in suitable containers and tanks designed for hydrocarbon products. Storage areas should be cool, adequately ventilated, and kept away from flames, sparks, and sources of heat.
For bulk transportation, the appropriate transportation method and safety requirements should be determined according to the actual properties of the shipment, its SDS, and applicable regulations governing the transportation of combustible materials.
Purchasing and Exporting Solvent 503 from Iran
Solvent 503 is a refinery product available in the Iranian market and has also been offered on the Iran Energy Exchange.
For export transactions, the price of Solvent 503 may vary depending on the producer, delivery location, transaction volume, market conditions, transportation costs, and payment terms. Therefore, quoting a single fixed price without specifying the commercial terms does not provide an accurate representation of the actual export price.
When purchasing Solvent 503, buyers are advised to verify the technical specifications, COA, SDS, loading location, available volume, and delivery terms before finalizing the transaction.
Conclusion
Solvent 503 is a hydrocarbon fraction with a 210–295°C distillation range, a density of approximately 819.9 kg/m³, a flash point of 87°C, and an aromatic content of 22 wt%. The combination of these properties makes it a product worth considering for a range of industrial applications, particularly certain paint, resin, adhesive, and hydrocarbon-based formulations.
For accurate product selection, the end-use requirements and required technical specifications should be evaluated together with the COA of each shipment. In the industrial solvent market, a single number on an actual certificate of analysis can sometimes be more important than ten pages of sales literature.
For Solvent 503 prices, technical specifications, COA, and export terms, contact the sales department of Alkimia LLC.





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