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Different capacities of glass sampling tubes

Borosilicate glass Nessler colorimetric tube set with 50ml graduated markings and PTFE-lined screw caps, shown with green and red colored solutions for water quality color comparison testing

Researcher testing with glass colorimetric tube

Comparison of lab colorimetric tube sizes

Single glass colorimetric tube with seal cap

5 ml flat bottom glass colorimetric tube with frosted stopper and full-mark graduation for analytical chemistry.

5 ml flat bottom borosilicate tube half-mark graduation with screw-cap frosted stopper.

10 ml flat bottom borosilicate tube, full-mark graduation and frosted stopper for volumetric analysis.

10 ml flat bottom borosilicate tube, half-mark graduation and frosted stopper for color comparison.

15 ml flat bottom volumetric tube full-mark graduation and frosted stopper.

15 ml flat bottom volumetric tube half-mark graduation with frosted stopper.

25 ml flat bottom borosilicate tube full-mark with frosted stopper for analytical colorimetry.

25 ml flat bottom volumetric tube half-mark graduation, frosted stopper screw-cap design.

35 ml flat bottom borosilicate tube with frosted stopper full-mark scale.

35 ml flat bottom volumetric tube half-mark scale and frosted glass stopper.

50 ml flat bottom borosilicate tube full-mark graduation and frosted stopper.

50 ml flat bottom volumetric tube half-mark scale with frosted stopper.

75 ml flat bottom borosilicate tube, full-mark graduation, frosted stopper for chemical analysis.

75 ml flat bottom volumetric tube half-mark graduation with frosted stopper.

100 ml flat bottom borosilicate tube full-mark scale, frosted stopper for colorimetric work.

100 ml flat bottom volumetric tube half-mark graduation with frosted stopper.

150 ml flat bottom borosilicate tube full-mark graduation with frosted stopper for large-volume analysis.

150 ml flat bottom volumetric tube half-mark graduation, frosted glass stopper.

5 ml round bottom borosilicate tube full-mark graduation with frosted stopper.

5 ml round bottom volumetric tube half-mark graduation with frosted stopper.

10 ml round bottom borosilicate tube full-mark scale, frosted glass stopper.

10 ml round bottom volumetric tube half-mark graduation with frosted stopper.

15 ml round bottom borosilicate tube full-mark with frosted stopper.

15 ml round bottom volumetric tube half-mark graduation and frosted stopper.

25 ml round bottom borosilicate tube full-mark with frosted stopper for analytical colorimetry.

25 ml round bottom volumetric tube half-mark graduation with frosted stopper.

35 ml round bottom borosilicate tube full-mark with frosted stopper.

35 ml round bottom volumetric tube half-mark scale and frosted stopper.

50 ml round bottom borosilicate tube full-mark graduation and frosted glass stopper.

50 ml round bottom volumetric tube half-mark graduation with frosted stopper.

75 ml round bottom borosilicate tube full-mark scale, frosted stopper for analytical chemistry.

75 ml round bottom volumetric tube half-mark graduation and frosted stopper.

100 ml round bottom borosilicate tube full-mark scale and frosted stopper.

100 ml round bottom volumetric tube half-mark graduation with frosted stopper.

150 ml round bottom borosilicate tube full-mark scale, frosted stopper for colorimetric analysis.

150 ml round bottom volumetric tube half-mark graduation with frosted stopper for color matching.

Features & Details

🧪 OPTICAL CLARITY

Crafted from pure high-borosilicate glass. It provides exceptional light transmission for highly accurate visual color comparisons.

🔒 FROSTED STOPPER

Equipped with a precision-ground frosted glass stopper. It guarantees a flawless airtight seal to prevent sample evaporation easily.

📏 CLEAR SCALE

Features highly visible printed volumetric markings. It enables accurate liquid volume readings even after repeated lab cleaning.

📐 UNIFORM WALLS

Manufactured with consistent glass thickness. This strictly eliminates optical distortion during critical chemical testing procedures.

About this item

Product specification

Attribute

Product Specifications

Material & Structural Features

Material Construction

Premium High-Borosilicate Glass (Chemically Inert)

Stopper Type

Precision Ground Frosted Glass Stopper (Airtight Seal)

Optical Properties

High Light Transmittance, Uniform Wall Thickness (Low Distortion)

Operational Specifications & Capacities

Available Capacities

5mL (0.17 fl oz)
10mL (0.34 fl oz)
25mL (0.85 fl oz)
50mL (1.69 fl oz)
100mL (3.38 fl oz)

Thermal Warning

NOT Heat-Resistant. Direct heating will destroy optical clarity.

Target Application

Visual Colorimetric Analysis, Water Quality Testing, Concentration Estimation

Accurate Visual Analysis for Labs

Checking chemical concentrations through color matching is a basic lab task. It is vital for environmental monitoring. Standard test tubes have uneven walls. This causes severe optical distortion easily. It leads to inaccurate data recording. Because of this, a reliable glass colorimetric tube is essential for lab technicians. Our high-transparency vessel provides a clear optical path. It lets you match sample hues against standard solutions perfectly. Strict water testing requires high optical standards. In fact, professional labs follow the ASTM D1209 color testing method to ensure accuracy. We build these tubes using premium Boro 3.3 glass natively. It meets these precise optical rules completely. This ensures your projects achieve the highest scientific quality.

1High Optical Transmittance

We designed this vessel strictly for optical comparisons. Cheap soda-lime glass has microscopic impurities. It also has a greenish tint. This ruins sensitive color readings quickly. However, our product uses highly pure borosilicate glass. It delivers superior light transmission. It also features a uniform wall thickness. This guarantees light passes through your sample without any distortion.

2Precision Frosted Stopper

Evaporation ruins volatile standard solutions fast. It changes their chemical concentration completely. This ruins your baseline tests. We add a frosted glass stopper to fix this. The frosted surfaces interlock perfectly. They create a robust airtight seal. It traps volatile vapors inside the chamber safely. This protects your standard samples from bad air contamination.

3Wear-Resistant Scale Lines

Fading volume lines cause bad measurement errors. Every tube has highly visible printed markings. We bake them directly into the glass surface. These durable lines resist strong chemical cleaning agents. They survive mechanical wiping effortlessly. These clear scales give technicians accurate liquid volume readings instantly.

Core Capabilities of the Tube

⚖️ Capacity Range

Available in sizes from 5mL up to 100mL. It matches standard analytical testing needs perfectly.

🛡️ Chemical Inertness

The stable glass ensures zero chemical reactions. It safely holds aggressive acids or alkaline solutions.

⚠️ Non-Heatable

Strictly designed for room temperature tests. Direct heating ruins the glass and destroys optical clarity.

🧽 Easy Cleaning

Clean gently with soft sponges. This prevents micro-scratches that could impact light transmission.

Buying a professional glass colorimetric tube improves your visual analysis accuracy. Our vessels combine high optical clarity with a secure stopper. They are perfect for water quality tests and concentration checks. Browse our full Lab Glassware catalog today. You will find the best lab hardware for your facility quickly.

Related products:
frosted-lid glass weighing bottle

Use Cases

Environmental Monitoring Home DIY & Repair Leak-Proof Design Sample Preparation School Science Labs

FAQs

Q1: What is the main difference between a colorimetric tube and a standard test tube?

A1: A standard test tube is designed primarily for mixing and heating, so variations in glass thickness are acceptable. A colorimetric tube is a highly specialized optical instrument. It is manufactured with absolutely uniform wall thickness and flat bottoms to ensure light passes through the liquid without distortion, allowing for highly accurate visual color comparisons.

Q2: Why can't I heat this glass colorimetric tube?

A2: Heating the glass expands the material unevenly. Even minor thermal warping will permanently destroy the perfectly uniform optical path of the glass wall. Once distorted, light will refract incorrectly through the tube, ruining all future color comparison analyses.

Q3: How should I clean these tubes without scratching them?

A3: You must never use hard-bristle test tube brushes, as microscopic scratches on the inner wall will interfere with light transmission. Instead, rinse them immediately after use and soak them in specialized laboratory chromic acid washing solutions or ultrasonic ultrasonic cleaners to remove stubborn chemical residues safely.

Q4: Why does it use a frosted glass stopper instead of a rubber cork?

A4: Colorimetric analysis often involves storing a set of “standard reference solutions” for months. Rubber corks degrade over time and allow volatile liquids to evaporate, which changes the concentration and color of your standard. The precision-ground frosted glass stopper provides a permanent, leak-proof, and chemically inert seal.

Boro 3.3 Glass Colorimetric Tube with Frosted Stopper (5mL-100mL)

Price range: $6.99 through $18.99

Extra 5% Off with code: welcome5

Capacity

Bottom

Cap

Clear

6–12 Month Warranty

Repair & Refund support available for most products.

Free Worldwide Shipping

Ships within 3 business days.

Taxes & Duties

Buyer responsible for local import fees.

24/7 After-Sales Support

Technical assistance & video guidance within 24h.