Reagent Bottles (Wide Mouth) – Amber

Quick Answer: An amber wide mouth reagent bottle is a brown-tinted bottle with a broad neck, used to store solids, pastes and viscous materials that are sensitive to light. The wide opening lets a spatula reach the contents while the amber tint cuts down ultraviolet and blue light.

Light-Sensitive Solids Need a Wide Neck Too

Not every light-sensitive chemical is a liquid. Silver nitrate crystals and other silver salts, some iodides, certain dyes and indicators, and several biological stains are stored as solids and taken out a spatula-load at a time. This bottle combines the access of a wide neck with the light filtering of amber, so such solids can be weighed out without pouring and stay protected between uses.

As with the narrow mouth version, the title does not say whether the bottles are glass or plastic. Amber glass is non-porous and resists most chemicals and solvents; amber polypropylene or polyethylene is lighter and does not shatter. Some solids, iodine crystals among them, should not be kept in polyethylene, so the material matters.

For light-sensitive solutions, the narrow mouth amber bottle is the better container. Ordinary white wide mouth plastic bottles are fine for solids that light does not affect.

Specifications

Applications

• Silver nitrate crystals and other silver salts used to prepare test reagents
• Solid dyes, stains and indicators whose containers specify protection from light
• Semi-solid preparations, such as ointment bases in pharmacy practicals, that must be scooped
• Dividing a large stock of a light-sensitive solid into smaller working bottles for student use

Care & Handling

• Use a clean, dry spatula every time; moisture together with light speeds up decomposition of many sensitive solids.
• Keep the bottle closed and in a dark cupboard between uses.
• Wear gloves when handling silver nitrate, which stains skin black.

Why Choose LabEquip

Prep rooms and pharmacy practical labs that keep light-sensitive solids in stock use amber wide mouth bottles for easy weighing. LabEquip offers them with its chemistry lab equipment; confirm glass or plastic and capacity through the contact page.

Frequently Asked Questions

What is the difference between wide mouth and narrow mouth amber bottles?

Both filter light in the same way. The wide mouth version is for solids and pastes that are scooped out, and the narrow mouth version is for liquids that are poured.

Why does silver nitrate need a dark bottle?

Light, especially with traces of organic matter, reduces silver nitrate to silver, which darkens the crystals and lowers their purity. An amber bottle in a closed cupboard slows this considerably.

Can iodine crystals be stored in an amber wide mouth bottle?

In amber glass with a well-fitting closure, yes. Iodine should not be stored in polyethylene or similar plastics, because its vapour passes into the plastic and stains it.

Can I store ointments or creams in these bottles?

Wide-necked containers are commonly used for semi-solids because a spatula can reach every part. Check that the bottle material is compatible with the base, particularly with oily or solvent-containing preparations.

How should the bottle be cleaned between uses?

Empty it fully, wash with warm water and laboratory detergent, rinse with distilled water and dry completely before refilling. Any damp residue can react with a fresh solid.

Is a plastic amber bottle as effective as a glass one?

Both filter light through their tint, though how much depends on the depth of colour and the wall thickness. Glass is less permeable to gases and solvent vapours, while plastic is lighter and does not shatter if dropped.

Last Updated: September 2026