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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. 4197-07-3
C.I. No. 16570
Molecular Weight 468.37g/mole
Solubility 0.1% (in Methanol) Clear red solution
Absorption maximum (in Methanol) 510 – 513nm
Absorptivity 1%/ 1cm, (in Methanol) > 475
Dye content (by Spectrophotometry) >75%
Loss On Drying at 110 degrees C (1hr) < 10%

Average Stock Availability (in Kg)

Chromotrope 2R

Acid red 29 is an organic sodium salt that is the disodium salt of 4,5-dihydroxy-3-(phenyldiazenyl)naphthalene-2,7-disulfonic acid. The Chromotrope 2R modified Gomori Trichrome Stain is a high-quality stain specifically formulated for the staining of osteochondral tissues. This stain is designed to deliver reliable and consistent results, allowing for clear visualization of eosinophils in lung sections. With its unique combination of ingredients, the Chromotrope 2R stain is an essential tool for researchers and laboratory professionals in the field of histology. Its effectiveness and specificity make it an invaluable asset in the study of tissue samples. Chromotrope 2R, is known for its ability to produce distinct and vibrant colors, enhancing the visualization of different tissue structures. Chromotrope 2R has high affinity for phospholipids and is used for the staining of mitochondrial and endoplasmic reticulum membranes in histological samples. Chromotrope 2R is used for the staining of microsporidia in body fluids and stool samples. Chromotrope 2R has high affinity for phospholipids and is used for the staining of mitochondrial and endoplasmic reticulum membranes in histological samples. Chromotrope 2R can be used as a chromogenic analytical probe for the quantification of proteins. Basic proteins are stained red and the peak wavelength red shifts from 501.6 nm to 567 nm.
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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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