AM Scientific

Laboratory chemicals are pure or mixed substances (liquids, solids, gases) used in scientific labs for research, testing, synthesis, and analysis, acting as reagents, solvents, or basic building blocks for drug discovery, quality control, or fundamental experiments, requiring high purity for accurate results and varying in hazard levels from mild to corrosive. Key Characteristics

• Purity: Often high-purity substances (fine chemicals) to ensure reliable experimental outcomes.
• Variety: Includes basic acids (HCl, H₂SO₄), bases (NaOH), solvents (ethanol, acetone), indicators, and complex organic/inorganic compounds.
• Form: Available as liquids, solids, or gases, and sometimes as mixtures. 

Common Uses

• Reagents: Substances added to cause or detect a reaction (indicators, precipitants).
• Solvents: Dissolve other substances (e.g., ethanol, methylene chloride).
• Synthesis: Starting materials to build new, complex chemicals.
• Analysis: To test samples, monitor reactions, and determine composition (chromatography, spectroscopy).
• pH Adjustment: Acids and bases used to control acidity/alkalinity. 

Examples

• Acids: Hydrochloric Acid (HCl), Sulfuric Acid (H₂SO₄).
• Bases: Sodium Hydroxide (NaOH).
• Solvents: Ethanol, Acetone.
• Others: Hydrogen Peroxide, Nitric Acid. 

Importance

• They are fundamental to scientific progress, driving innovation in medicine, materials science, environmental monitoring, and more. 

Buffer capsules pH 4.00±0.05 contain a precisely weighed amount of free-flowing, soluble powder that, when dissolved in a specified amount of distilled or deionized water (typically 100 ml), prepares a standard buffer solution with a pH of 4.00 at 20°C (or 4.01 at 25°C). Key Features and Description

• Primary Use: These capsules are specifically designed for the accurate calibration of pH meters, monitors, and controllers in laboratory and industrial settings.
• Precision: The resulting solution provides a precise and stable pH value with a tolerance of ±0.05 (or sometimes ±0.04 or ±0.02, depending on the manufacturer and temperature).
• Convenience: They offer a convenient, single-use, and cost-effective alternative to pre-made liquid buffer solutions, which often have a shorter shelf life once opened.
• Formulation: The powder inside is often color-coded (commonly white, and the resulting solution may be clear or red) to prevent mix-ups with other pH levels (e.g., pH 7.0 or 9.2). The solid form and packaging with silica gel help prevent moisture contamination, ensuring a longer shelf life, typically around 2 years or more.
• Traceability: Many products are traceable to national and international standards, such as NIST (National Institute of Standards and Technology), ensuring reliable and accurate results for professional applications.
• Application: Ideal for routine analytical processes in quality control, academic, and research institutions. 

A selenium standard for Atomic Absorption Spectrophotometry (AAS) is a solution containing a precisely known concentration of selenium, typically 1000 mg/L (or 1 g/L), dissolved in a dilute nitric acid solution. These standards are used to calibrate AAS instruments, ensuring accurate measurements of selenium concentration in various samples. They are produced and certified according to ISO standards, ensuring traceability and reliability. Key aspects of Selenium AAS Standards:

• Concentration: Commonly available at 1000 mg/L (or 1 g/L). 
• Matrix: Dissolved in dilute nitric acid (e.g., 2% HNO3 or 0.5M HNO3). 
• Purity: Prepared from high-purity selenium metal or salts. 
• Certification: Produced and certified according to ISO/IEC 17025 and ISO 17034, ensuring traceability to SI units and National Metrology Institutes like NIST. 
• Traceability: Traceable to a primary standard, often NIST, for accurate calibration. 
• Application: Used for calibrating AAS instruments in the determination of selenium concentration in various samples. 
• Storage: Stored under appropriate conditions (e.g., room temperature, protected from light). 
• Shelf Life: Typically have a shelf life of 24 months (unopened) and 12 months (after opening), but this can vary. 

A Selenium standard for Atomic Absorption Spectrometry (AAS) is a solution containing a precisely known concentration of Selenium, typically 1000 µg/mL, dissolved in a suitable matrix like dilute nitric acid (HNO3). This standard is used to calibrate AAS instruments and ensure accurate measurements of Selenium concentration in various samples. Key characteristics of a Selenium AAS standard:

• Concentration:Usually 1000 µg/mL (1 g/L) of Selenium. 
• Matrix:Typically dissolved in a dilute nitric acid solution (e.g., 0.5M HNO3 or 2% HNO3). 
• Purity:Manufactured from high-purity Selenium metal or a suitable salt, ensuring low impurity levels. 
• Traceability:The standard should be traceable to a recognized National Metrology Institute (NMI) like NIST. 
• Certification:Produced and certified according to standards like ISO 17034 and ISO/IEC 17025, ensuring quality and reliability. 
• Quality Control:Rigorous testing, often using ICP-MS, to verify the concentration and purity. 
• Shelf Life:Has a defined shelf life, typically 36 months, under recommended storage conditions. 

Applications:

• Calibration of AAS instruments: Used to create a calibration curve for accurate Selenium concentration measurements. 
• Quality control: Ensures the reliability and accuracy of analytical results. 
• Determination of Selenium in various matrices: Employed in the analysis of food, environmental samples, and other materials. 

Example:A Selenium AAS standard might be described as: "Selenium Standard for Atomic Absorption (AAS) 1000 µg/mL in 0.5M Nitric Acid (HNO₃)". This indicates a solution containing 1000 micrograms of Selenium per milliliter of solution, dissolved in a 0.5 molar solution of nitric acid. 

An arsenic AAS (Atomic Absorption Spectroscopy) standard is a solution of a known concentration of arsenic, used to calibrate and verify the accuracy of AAS instruments during analysis. These standards are typically prepared from high-purity arsenic compounds and are available in various concentrations and matrices, often in diluted nitric or hydrochloric acid. Here's a more detailed description:Key Characteristics:

• Concentration:Arsenic AAS standards are available in various concentrations, with common examples being 1000 mg/L (1 g/L) and 1 mg/mL. 
• Matrix:The standards are often dissolved in a dilute acid, such as nitric acid (HNO3) or hydrochloric acid (HCl), to maintain stability and prevent precipitation. The concentration and type of acid used can vary depending on the specific application and manufacturer. 
• Purity:High-purity arsenic compounds are used in the preparation of these standards, ensuring reliable and accurate results. 
• Traceability:Many arsenic AAS standards are traceable to reference materials like those from NIST (National Institute of Standards and Technology), ensuring a known and reliable source for the arsenic concentration. 
• Physical Properties:Common physical properties include a clear, colorless liquid appearance, and a density close to 1 g/cm3 at 20°C. 
• Safety:Arsenic standards are hazardous and require careful handling due to the toxicity of arsenic. They are often labeled with hazard symbols like GHS05 (corrosive) and GHS08 (health hazard), and a "Danger" signal word. 

Applications:

• Calibration:Arsenic AAS standards are essential for calibrating AAS instruments to accurately measure arsenic concentrations in samples. 
• Quality Control:These standards are used to verify the accuracy and precision of AAS measurements, ensuring reliable results. 
• Elemental Analysis:AAS standards are widely used in various fields for the determination of arsenic concentrations in diverse samples like water, food, and environmental samples. 

Example:A common example is a 1000 mg/L arsenic standard in dilute nitric acid (0.5 mol/L HNO3), which is clear and colorless, according to Loba Chemie. This standard can be used to calibrate AAS instruments for measuring arsenic levels in different matrices. 

Qualigens haematoxylin staining powder is a naturally derived dye used in histology and cytology to stain cell nuclei blue-violet to black. Extracted from the logwood tree, this C.I. 75290 substance, also known as natural black 1, forms "hematoxylin lakes" with metal salts (mordants) to selectively stain DNA. It's a key component in the common H&E (Hematoxylin and Eosin) stain.
 Description of Qualigens Haematoxylin Staining Powder

• Purpose: To stain the nuclei of cells. 
• Origin: Extracted from the heartwood of the logwood tree (Haematoxylum campechianum). 
• Color: Deep blue-purple. 
• Form: A powder. 
• Application: Used in histology and cytology to visualize cell structures, particularly the nucleus (DNA). 
• Mechanism: When combined with a positively charged metal salt (a mordant), such as aluminum salts, it forms a complex called a "hematoxylin lake" that selectively binds to the negatively charged DNA in the nucleus. 

Key Characteristics and Uses

• C.I. 75290: Its Chemical Identification Number, also known as natural black 1. 
• H&E Staining: A crucial component of the Hematoxylin and Eosin stain, one of the most frequently used staining procedures in histology. 
• Other Uses: A component of the Papanicolaou (PAP) stain for cytology specimens. 
• Clinical Use: Some hematoxylin products are registered for clinical diagnostic purposes. 

Qualigens DPX Mountant is a non-aqueous, synthetic resin medium for mounting histological specimens on microscope slides, providing a clear, durable, and long-lasting solution for preserving stained tissue samples like those stained with H&E, Nissl, or Masson-Goldner. A mixture of distyrene, a plasticizer (typically dibutyl phthalate), and xylene, it replaces older media and is known for its effectiveness in keeping stains bright and allowing for clear visualization of cellular structures under a microscope. Key Features & Benefits

• Preserves Stains:DPX helps to maintain the clarity and brilliance of various histological stains, such as H&E, ensuring better visualization of the tissue. 
• Durable & Long-Lasting:It forms a clear, durable, and permanent mount, protecting the specimen for future analysis and long-term storage. 
• Quick Drying:DPX dries to the touch relatively quickly, making the mounting process more efficient. 
• Versatile:It is compatible with a range of detection methods and suitable for viewing different types of stained tissue samples. 
• Synthetic, Non-Aqueous Medium:As a synthetic, water-free resin, it's used to permanently fix specimens and replace older media like Xylene-Balsam. 

CompositionDPX Mountant is a solution containing: 

• Distyrene: A type of polystyrene.
• Plasticizer: An agent that provides flexibility (initially tricresyl phosphate, now commonly dibutyl phthalate).
• Xylene: A solvent that aids in the application and drying process.

Qualigens is a brand that supplies "Phenol (ER ACS)", an American Chemical Society (ACS) certified reagent grade phenol, which is a crystalline solid or liquid that appears colorless or faintly pink, with a distinctive tarry, sickly sweet odor. It is a toxic, corrosive chemical used in various applications, including the production of plastics, detergents, pharmaceuticals, dyes, and in laboratory procedures like DNA extraction. The "ER" likely indicates it is a "For Reagent" grade, used for analytical and chemical purposes. Chemical Properties & Appearance 

• Formula: C6H5OH
• Molecular Weight: 94.11 g/mol
• Form: Colorless to white crystalline solid, though it may appear as a liquid or faint pink/yellowish in commercial forms.
• Odor: Distinctive, sickeningly sweet, and tarry.
• Acidity: Aqueous solutions are acidic.

Applications 

• Chemical Synthesis:Precursor for cyclohexanone, plastics (like polycarbonates and epoxy resins), nonionic detergents, and synthetic fibers.
• Pharmaceuticals:Used in the manufacture of pharmaceutical drugs, including some mouthwash and sore throat lozenges.
• Disinfectant & Antiseptic:Used in some medical and cosmetic preparations.
• Molecular Biology:Utilized in the phenol-chloroform extraction technique for isolating nucleic acids.

Safety and Handling 

• Toxicity: Toxic by ingestion, inhalation, and skin absorption.
• Corrosivity: Causes severe skin burns and eye damage.
• Health Effects: Prolonged exposure can cause serious damage to organs.
• Combustible: Phenol is a combustible material.

"ER ACS" Meaning

• ER (For Reagent):Indicates the chemical's intended use is for laboratory reagents and analytical purposes. 
• ACS (American Chemical Society):Signifies the product meets the rigorous standards for purity and quality set by the American Chemical Society, ensuring its suitability for scientific work. 

Buffer capsules with a pH of 7.00 ±plus or minus± 0.05 are a convenient way to prepare a standard pH 7.0 buffer solution for calibrating pH meters or as a control sample. To use, dissolve one capsule in 100 ml of distilled water; the resulting solution will have a pH of 7.00±0.057.00 plus or minus 0.057.00±0.05 at 20∘C20 raised to the composed with power cap C20∘��. These are soluble powders, often in a capsule form, that create a clear, ready-to-use buffer solution in minutes. 

Calconcarboxylic acid (IUPAC name 3-hydroxy-4-[(2-hydroxy-4-sulfonaphthalen-1-yl)diazenyl]naphthalene-2-carboxylic acid; commonly called Patton and Reeder's Indicator) is an azo dye that is used as an indicator for complexometric titrations of calcium with ethylenediaminetetraacetic acid (EDTA) in the presence of ...

Merck's Hyamine 1622 solution is a standardized, clear, colorless aqueous solution of the cationic surfactant benzethonium chloride, primarily used in analytical chemistry for titrating anionic surfactants (tensides) via the two-phase titration method, often as a 0.004 mol/L (or 0.04N) TitriPUR® reagent, known for its antimicrobial properties and application in cosmetics. Key Characteristics:

• Chemical Identity: Benzethonium chloride (a quaternary ammonium salt).
• Type: Cationic detergent/surfactant.
• Appearance: Clear, colorless liquid.
• Concentration: Commonly available as 0.004 mol/L (or 0.04N).
• Purity: TitriPUR® grade, indicating high purity and suitability for titrations.
• Application: Primarily for determining the concentration of anionic surfactants (like petroleum sulfonates). 

How it's Used (Analytical):

• It acts as a titrant in the Ellman procedure or two-phase titration to quantify anionic substances. 

Other Uses (General):

• Due to its antimicrobial nature, it's also used in cosmetics, shampoos, and as a stopping agent in specific biochemical tests. 

Qualigens Labolene Neutral pH is a phosphate-free, biodegradable, neutral-pH liquid concentrate for general lab cleaning (glassware, benches) that's efficient, safe, and prevents residue carryover for accurate analysis, working in hard/soft water and unaffected by heavy metals, requiring minimal concentration (as low as 0.5%) for cleaning and used in ultrasonic baths or manually. Key Features & Description:

• Type: Liquid, all-purpose, neutral pH, biodegradable detergent.
• Application: Ideal for cleaning laboratory glassware, walls, benches, and fittings to ensure accurate scientific results.
• Performance:
  • Effective in hard, soft, or salt-containing water.
  • Unaffected by acidic solutions or heavy metal salts.
  • Prevents residue carry-over, crucial for analyses.
• Efficiency: Economical, used in low concentrations (around 0.5%).
• Safety: Safe and environmentally friendly; wear gloves/eye protection as it can cause skin/eye irritation.
• Packaging: Available in 500ml and 5L packs. 

How it's Used:

• Dilute to a low concentration (e.g., 0.5%).
• Use for manual washing or in ultrasonic cleaning baths.
• Wash thoroughly with water after use. 

Based on the available documentation from Thermo Fisher Scientific, the Qualigens product with code Q39222 is Methyl Violet (also known as Methyl Violet 2B or Methyl Violet 6B). Thermo Fisher Scientific +2Product Description & Specifications

• Product Name: Methyl Violet
• Description: Dark green powder
• CAS Number: 8004-87-3 (commonly associated with this product name)
• Application: Laboratory reagent and indicator, often used for pH determination.
• Transition Interval (pH): 0.1 to 2.0 (Colour changes from greenish-yellow to violet)
• Maximum Absorption (): 589 - 594 nm
• Specific Absorptivity (): 2000 - 2450 ( in water) Thermo Fisher Scientific +4

Key Features

• Quality: Certified for analytical use.
• Grade: Analytical Reagent (AR) or equivalent standard typically indicated by Qualigens.

Aquastar® CombiTitrant 1 (188001) from Merck is a single-component reagent designed for volumetric Karl Fischer titration, typically used for water determination at a concentration of approximately 1 mg  per 1 mL. It combines iodine, base, and sulfur dioxide in one liquid, red-brown solution, offering flexibility in choosing solvents, high accuracy, and 36-month stability.Key Description & Properties:

• Product Type: One-component, volumetric Karl Fischer titrant.
• Concentration:  (nominal).
• Appearance: Red-brown liquid.
• Shelf Life: 36 months (from manufacturing date).
• Storage Temperature: 15-25°C.

The Merck product code 1.94507.5021 refers to:

Merck Water (Distilled), EMPLURA®

Brand: Merck KGaA (Sigma-Aldrich / Supelco line)

Description

• Product: Water, distilled (EMPLURA® grade)
• Chemical formula: H₂O
• CAS number: 7732-18-5
• Type: General laboratory reagent / solvent grade water
• Quality level: EMPLURA® (economy lab grade for routine applications)

Key Features

• Distilled water (not sterile, not ultrapure)
• Designed for basic laboratory use, cleaning, and routine experiments
• Supplied in 5 L packaging (code: 1.94507.5021)

SRL – Laboratory Chemicals 

Sisco Research Laboratories Pvt. Ltd. (SRL) is one of India’s leading manufacturers and suppliers of high-quality laboratory chemicals, reagents, and biochemicals. Established in 1974, SRL has been serving scientists, researchers, and industries for over five decades.

SRL’s laboratory chemical range includes analytical reagents, high-purity solvents, fine chemicals, indicators, acids, buffers, and culture media components, all manufactured under strict quality standards such as ISO 9001:2015, ISO 17025:2017, and cGMP guidelines.

With over 10,000 products, SRL caters to laboratories in pharmaceutical, biotechnology, chemical, food, and environmental sectors. Each product is tested for purity and performance to ensure reliability in research and analytical applications.

SRL’s commitment is to provide Indian-made, internationally comparable laboratory chemicals—helping replace expensive imports while maintaining world-class quality, consistency, and safety.

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A Turbidity Standard Solution 1000 NTU is a liquid used to calibrate and validate turbidity meters. It's a reference material with a known turbidity level of 1000 Nephelometric Turbidity Units (NTU), which is a measure of the amount of light scattered by particles in a liquid. Key Characteristics and Uses:

• Calibration and Validation:Turbidity meters are used to measure the turbidity of water samples, and they need to be calibrated periodically to ensure accuracy. Turbidity standards like this one are used to set the meter's scale and verify its performance. 
• Formazin:Many turbidity standards are based on a suspension of formazin, a synthetic polymer that provides a stable and reproducible turbidity level. 
• Certification:These standards are usually supplied with a certificate of analysis, which provides information about the specific turbidity value, lot number, and expiration date, allowing for traceability to NIST traceable standards. 
• Storage:They often require refrigeration (e.g., between 2°C and 8°C) to maintain stability and shelf life. 
• Application:They are used in various applications, including environmental monitoring, water quality testing, and process control, where accurate turbidity measurements are crucial. 

Readycult® Coliforms 100 by Merck (Sigma-Aldrich) is a rapid, ready-to-use chromogenic culture medium in a snap-pack for detecting total coliforms and E. coli in 100 mL water samples, turning blue-green for coliforms and showing blue fluorescence under UV for E. coli, offering an easy, quick, EPA-approved test for drinking water quality.} Key Features:

• Simultaneous Detection: Detects total coliforms and E. coli in one step.
• Chromogenic/Fluorogenic: Uses X-GAL (cleaved by coliforms for blue-green color) and MUG (cleaved by E. coli for blue fluorescence under UV).
• Easy-to-Read: Provides clear, definitive color change (yellow to blue-green) for coliforms and fluorescence for E. coli.
• Rapid & Convenient: Supplied in single-use snap-packs for fast preparation, giving results within 18-24 hours.
• Selective: Lauryl sulfate inhibits most other bacteria, especially Gram-positives.
• EPA Approved: Acceptable for monitoring drinking water under the Total Coliform Rule. 

How it Works:

1. Add to Sample: A single snap-pack is added to 100 mL of water.
2. Incubation: Incubate for 18-24 hours.
3. Positive for Coliforms: The medium turns blue-green if total coliforms are present.
4. Positive for E. coli: If E. coli is present, it causes blue fluorescence under a UV light (365 nm), in addition to the blue-green color.
5. Optional Confirmation: An indole test can be performed for definitive E. coli confirmation. 

Qualigens product Q27908 is a Sodium Hypochlorite Solution with approximately 4% available chlorine, commonly used as a laboratory or microbiological reagent. Product Details:

• Product Name: Sodium Hypochlorite Solution (SQ grade)
• Code: Q27908
• Pack Size: 5 Liters
• Manufacturer: Qualigens (part of Thermo Fisher Scientific)
• Usage: Frequently used as a disinfectant or oxidizing agent in labs.