Import Acid Red 37 — Buy in Bulk from Supplier in India

Acid Red 37 from Krishna Impex is a monoazo acid dye with CAS registry 6278-52-4, supplied from Bhayander in Thane district, Maharashtra, India. The listing describes a 45% concentration liquid or paste preparation, though the physical state should be confirmed directly with the supplier. This dye produces brilliant red shades on wool, silk, nylon and modified acrylic fibres through conventional acid-dyeing techniques. The 45% strength figure refers to the commercial presentation form rather than pure dye content, a common industry convention for liquid acid dye preparations that facilitates automated dosing in modern dye houses.

The molecular structure of Acid Red 37 (C.I. Acid Red 37) contains a single azo group with sulphonic acid functionality, classifying it within the levelling acid dye category characterised by good migration and levelness properties. Standard commercial specifications for this dye index number typically show maximum absorption around 510-520 nm in aqueous solution. The dye is compatible with other levelling acid dyes for combination shades and works within a pH range of 2.0 to 5.5 depending on substrate type. Krishna Impex sources from a light industrial address in Bhayander, part of the Mumbai metropolitan region with established chemical trading infrastructure but not a primary dye manufacturing cluster like Ahmedabad or Ankleshwar.

Typical applications include piece dyeing and yarn dyeing of woollen fabrics, silk scarves and ties, nylon hosiery, and carpet yarns where bright scarlet shades with moderate wet fastness are acceptable. The dye is also used in paper coloration and ink formulations. Krishna Impex's listing mentions plastics and coatings applications, which would require confirmation of heat stability and migration resistance for polyolefin or PVC substrates. No packaging specification, MOQ, lead time, or verified certifications are established in the source data, so buyers must negotiate all commercial and technical terms directly with the supplier.

Krishna Impex operates from B-10, Om Sai Industrial Estate, Bhayander East Phatak Road, Thana 401105, Maharashtra, India. The address is in a light industrial estate within the Mumbai suburban region, suggesting trading or light processing operations rather than heavy chemical manufacturing. The supplier tier is marked as imported, and trust tier as harbour. Response rate is 0.00% with zero average response hours, meaning no historical buyer interaction data is available. No year of establishment, employee count, turnover, manufacturing licence, or export documentation is disclosed in the source profile.

The source description contains generic marketing language and claims ISO and CE certifications without certificate numbers, scopes, or issuing bodies specified. Buyers should independently verify any certification claims directly with Krishna Impex, requesting certificate copies with validity dates and accreditation marks. The address format and estate name suggest a small-to-medium enterprise rather than a large integrated manufacturer. No client references, production capacity figures, or R&D capabilities are mentioned.