--- product_id: 26668756 title: "AmScope SK-3N Negative Stain Kit of Three Chemicals for Preparing | 3 Negative Stains in One Kit 30 ml Hydrochloric Acid (1% in alcohol solution) 30 ml Congo Red (1% aqueous solution)" brand: "aldon" price: "€ 51.74" currency: EUR in_stock: true reviews_count: 1 url: https://www.desertcart.hr/products/26668756-amscope-sk-3n-negative-stain-kit-of-three-chemicals-preparing store_origin: HR region: Croatia --- # Enhances microscopic contrast 3 x 30ml precision stain solutions Includes safety data sheets AmScope SK-3N Negative Stain Kit of Three Chemicals for Preparing | 3 Negative Stains in One Kit 30 ml Hydrochloric Acid (1% in alcohol solution) 30 ml Congo Red (1% aqueous solution) **Brand:** aldon **Price:** € 51.74 **Availability:** ✅ In Stock ## Summary > 🔬 Elevate your microscopy game with precision stains that make every detail pop! ## Quick Answers - **What is this?** AmScope SK-3N Negative Stain Kit of Three Chemicals for Preparing | 3 Negative Stains in One Kit 30 ml Hydrochloric Acid (1% in alcohol solution) 30 ml Congo Red (1% aqueous solution) by aldon - **How much does it cost?** € 51.74 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/26668756-amscope-sk-3n-negative-stain-kit-of-three-chemicals-preparing) ## Best For - aldon enthusiasts ## Why This Product - Trusted aldon brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety First:** Comes with comprehensive safety data sheets for responsible chemical handling - • **Lab-Ready Volume:** Generous 30ml bottles ensure multiple staining sessions without reordering - • **Triple-Stain Power:** Three expertly formulated negative stains in one kit for versatile lab use - • **Contrast Like a Pro:** Dyes background, not bacteria, for crystal-clear microscopic imaging - • **Trusted Science Brand:** Backed by Innovating Science, a name professionals rely on ## Overview The AmScope SK-3N Negative Stain Kit includes three 30ml chemical solutions—Formalin-Nigrosin, Hydrochloric Acid (1%), and Congo Red (1%)—designed to enhance microscopic imaging by staining the background instead of bacteria. Ideal for chemistry and life science labs, this kit provides multiple uses with safety data sheets included for secure handling. ## Description A negative stain set colors the background of a smear rather than the bacteria (as a direct stain does). These stains have negatively charged functional groups so they can't bind directly to negatively charged bacteria. Kit Includes: 30ml Formalin-Nigrosin Solution 30ml Hydrochloric Acid 1% 30ml Congo Red 1% AQ DOT Info: Small quantity exemption 173.4 THIS PACKAGE CONFORMS TO 49 CFR 173.4 for domestic highway or rail transport only For Laboratory Use Only. Not for drug, food or household use. Keep out of reach of children. For more information, refer to the Safety Data Sheet. ## Features - Chemical kit designed to perform a negative stain on multiple cultures - Negative stains dye the culture background rather than the bacteria themselves, enhancing visibility - Kit contains enough material to run several stains - Perfect kit for chemistry labs - Safety data sheets included to inform safe storage and maintenance of chemicals ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B00U9QN5ZW | | Best Sellers Rank | #460,927 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #41 in Life Science Dyes, Fluorophores & Stains | | Brand | ALDON | | Color | clear or light-colored | | Customer Reviews | 4.2 4.2 out of 5 stars (22) 4.2 out of 5 stars | | Enclosure Material | Cardboard, Plastic, Glass | | Global Trade Identification Number | 00724832050148 | | Item Dimensions L X W X H | 6"L x 4"W x 2"H | | Item Weight | 3.2 ounces | | Manufacturer | Innovating Science | | Manufacturer Part Number | IS5014 | | Model Number | IS5014 | | Number Of Items | 1 | | Number Of Packs | 3 | | Objective Lens Description | Achromatic | | Unit Count | 3 Count | | Upc | 724832050148 | ## Product Details - **Brand:** ALDON - **Color:** clear or light-colored - **Global Trade Identification Number:** 00724832050148 - **Item Weight:** 0.2 Pounds - **Manufacturer:** Innovating Science - **Material:** Cardboard, Plastic, Glass - **Objective Lens Description:** Achromatic - **Product Dimensions:** 6"L x 4"W x 2"H - **UPC:** 724832050148 ## Images ![AmScope SK-3N Negative Stain Kit of Three Chemicals for Preparing | 3 Negative Stains in One Kit 30 ml Hydrochloric Acid (1% in alcohol solution) 30 ml Congo Red (1% aqueous solution) - Image 1](https://m.media-amazon.com/images/I/611E83dgqBL.jpg) ![AmScope SK-3N Negative Stain Kit of Three Chemicals for Preparing | 3 Negative Stains in One Kit 30 ml Hydrochloric Acid (1% in alcohol solution) 30 ml Congo Red (1% aqueous solution) - Image 2](https://m.media-amazon.com/images/I/51x-CrBMZHL.jpg) ![AmScope SK-3N Negative Stain Kit of Three Chemicals for Preparing | 3 Negative Stains in One Kit 30 ml Hydrochloric Acid (1% in alcohol solution) 30 ml Congo Red (1% aqueous solution) - Image 3](https://m.media-amazon.com/images/I/61qg5u6bCRL.jpg) ![AmScope SK-3N Negative Stain Kit of Three Chemicals for Preparing | 3 Negative Stains in One Kit 30 ml Hydrochloric Acid (1% in alcohol solution) 30 ml Congo Red (1% aqueous solution) - Image 4](https://m.media-amazon.com/images/I/81Jma7PdV4L.jpg) ## Questions & Answers **Q: Can you please tell me the molarity of the hcl in this kit? thank you** A: The molarity of the acid is negligibly low. The exact molarity is difficult to calculate given the ethanol in the solution. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Five Stars *by on Reviewed in the United States May 19, 2016* Great product. I use this in lab on a regular basis. ## Frequently Bought Together - ALDON Innovating Science Negative Stain Kit - Set of 3 30mL Microscope Stains - Congo Red, Hydrochloric Acid, Formalin Nigrosin Solution - ALDON Innovating Science Complete Microscope Slide Stains Kit - 19 Chemicals in 30mL Dropper Bottles - Includes Vital Stains (7), Bacteria Stains (5), Gram Stains (7) & Instruction Manual - AmScope BS-50P-100S-22 Pre-Cleaned Blank Ground Edge Glass Microscope Slides and 100pc Pre-Cleaned Square Glass Cover Slips Coverslips --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/26668756-amscope-sk-3n-negative-stain-kit-of-three-chemicals-preparing](https://www.desertcart.hr/products/26668756-amscope-sk-3n-negative-stain-kit-of-three-chemicals-preparing) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-08-14*