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Product Specifications

Specifications Parameters
Dye Content (By Spectrophotometry) >70%
Transition Range Ph 4.3-6.3
Ph 9.4-12.0
Brown Orange-Violet
Solubility 0.1% (Dist. Water) Clear Solution
Absorption Max (0.1N Naoh) Λ₁max 553-559Nm
Absorption Max (0.1N Naoh) Λ₂max 553-559Nm
Absorptivity (A1%/1Cm At 556 Λ₁max) >350
Absorptivity (A1%/1Cm At 595 Λ₂max) >325
Loss On Drying (110⁰C) <5%
Suitability For Microscopy Passes Test
Specifications Parameters
C.A.S. No. 15086-94-9
C.I. No. 45380
Molecular Weight 647.92g/mole
Solubility 0.1% (Methanol) Orange powder
Absorption maximum (Methanol) 520 – 526nm
Absorptivity (A1%/ 1cm in Methanol) > 1550
Loss On Drying at 110 degrees C (1hr) > 3%

Average Stock Availability (in Kg)

Eosin Yellow

Eosin Y (or just more commonly, eosin) is a water soluble dye and is a red crystalline powder, frequently used in textile dyeing and ink manufacturing. When in the sodium salt form, it’s a biological stain, and is also any of a class of red acid dyes of the xanthene group used as cytoplasmic stains and as counter-stains. Eosin can be used to stain cytoplasm, red blood cells, collagen, and muscle fibers for histological examination. A versatile red dye used in cosmetics, pharmaceuticals, textiles, etc., and as tissue stain, vital stain, and counterstain with HEMATOXYLIN. It is also used in special culture media. Eosin Y is a xanthene dye and is used for the differential staining of connective tissue and cytoplasm. In histopathology, it is applied as a counterstain after hematoxylin and before methylene blue. It is also used as a background stain, thereby giving contrast to the nuclear stains. Eosin Y Free Acid is widely used as a biological stain in histology, cytology, and microscopy. It is commonly employed to stain cell structures, including cytoplasmic regions, connective tissues, and collagen fibers. The dye provides contrast and aids in the visualization of specific tissue components. pH Indicator: Eosin Y Free Acid can also function as a pH indicator due to its pH-dependent color changes. It appears yellow in acidic solutions and transitions to red in alkaline conditions. This property makes it useful for pH measurements and as an indicator in various chemical assays. It can be used for dyeing natural and synthetic fibers to achieve various shades of red. The dye is utilized in the production of inks, particularly in the printing industry. It can be incorporated into various types of inks, including water-based and solvent-based inks, for applications such as offset printing and inkjet printing. Eosin Y Free Acid contributes to achieving vibrant red colors in printed materials. Eosin Y Free Acid exhibits inherent fluorescence properties and can be used as a fluorescent dye. It is employed in fluorescence microscopy and imaging techniques to visualize cellular structures and study biological processes.
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    frequently asked questions

    We ship free-of-cost samples (freight free) for all our products. In fact, we recommend to approve a pre-shipment sample before purchase of product.
    The globally accepted specifications of Merck, Sigma-Aldrich and ACS are the benchmark for all our products. And we surpass the benchmark for all our products.
    We provide all the technical assistance in testing the product by providing detailed Method-of-Analysis, standard spec copy, any benchmark data if available. We also, assist with live testing of the product. We do not believe in room for ambiguity, hence, all assistance is provided till customer is satisfied with the end result.
    With a team of profound expertise, we have hands-on experience of closely working with Unilever, Milliken, DKSH, Biosynth, Sigma Aldrich (now Merck) and many more industry leaders to jointly develop some exceptional and one of the most innovative Healthcare products.
    Almost all of the products are available in stock in bulk quantities. In a rare case, we take a couple of weeks for preparation.
    We strive to provide the purest form of the compound. However, we welcome our customer’s in-house specs and try our best to suffice their in-house spec compliance.
    Yes, we gladly welcome the procurement and R&D team to visit our manufacturing facility for audit and even to run trials for product development and application. What are the various streams of products manufactured by you?
    We started with a couple of pH Indicators and Biological Stains, but over the last 40 years, we have expanded to Life Science products, pH Indicators, Complexometric Indicators, and even Specialty Colors which have a specialised performance driven application.
    We have a dedicated 1600 sqft research and development division for development of different molecules belonging to color changing chemistry which help in development of innovative end-use applications in different products.
    We are extremely sensitive towards the environment and polluted water generated from processes is self treated using MVR distillation process at our facility ensuring zero discharge.
    We generally submit quotes of freight. On approval, we dispatch goods and keep consignee updated with shipment status at every step. Alternatively, we also ship on customer’s courier account.
    We usually submit a Pre-shipment Sample to customer for quality approval. Although, most customer prefer a simple COA approval, but we insist on sample approval to avoid all post-commercial shipment hiccups.
    Though, its a rare case (Since all products are mostly ready in stock), we usually intimate buyer of the lead time for preparation of the product. Buyer is updated with the status from time to time. Once product is ready, a PSS is sent for quality approval. On approval, we dispatch the product.
    For every inquiry of the product received, we send the pre-shipment sample representing the lot for quality approval. Only after approval, the commercial shipments are dispatched. Any issues in the quality of the product are resolved at the sampling stage. For the test of the sample, all assistance is provided from our end, with sufficient data and documentation. This has helped us fireproof the quality-related issues and have faced negligible rejections so far.

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