Start with a product requirement, not a family label
'Isophthalic resin' can be a buyer search term, but it is not enough information to select a Samrat product. The repository does not publish a standalone, non-fire-retardant general isophthalic product page or TDS that could support a direct value-by-value comparison with Vinyl Ester Resin.
The site does publish ISO Fire Retardant Resin as a separate isophthalic product route. In that product name, ISO refers to isophthalic chemistry, not ISO certification. Its fire-retardant context must remain separate from a Vinyl Ester chemical- or corrosion-service discussion.
What the current Vinyl Ester data establishes
Samrat's Vinyl Ester TDS identifies an industrial-grade Bisphenol-A epoxy vinyl ester product and lists industrial FRP application categories where chemical or corrosion service is relevant. It provides typical product data, not a performance chart against an unspecified isophthalic grade.
No direct chemical-resistance hierarchy, temperature ranking, corrosion-life comparison or mechanical comparison with a general isophthalic resin is published in the repository. This guide does not invent one.
Frame the selection around the actual service requirement
For a stated chemical- or corrosion-service requirement, review the Vinyl Ester Resin TDS alongside the actual medium, concentration, operating temperature where relevant, finished component and project documentation. For a stated isophthalic or fire-performance requirement, review the exact separately published product data instead.
If both a service environment and a fire requirement are present, communicate both. One label does not automatically satisfy the other, and the finished FRP system may need its own verification.