Catalogue · Labware

Quartz & Fused Silica Ware

Beakers, crucibles, dishes, flasks and cylinders in fused quartz and fused silica, for work above the working range of borosilicate.

8 categories · 333 published records. The catalogue we can supply is broader than the catalogue we publish — send us the item if you cannot find it.

Before you order

Borosilicate 3.3 softens around 820 °C and should not be worked near it. Fused quartz carries a far higher working temperature and a much lower expansion coefficient, which is why ashing, ignition to constant weight and trace-metal work move to quartz or silica. It costs several times as much and is more easily devitrified by alkali and by handling with bare fingers, so it is bought for the jobs that need it rather than as a general upgrade.

Related

What laboratories usually order alongside this.

Borosilicate 3.3 Glassware

Beakers, flasks, condensers, reagent bottles, funnels and extraction assemblies in low-expansion borosilicate glass.

Distillation & Extraction Assemblies

Soxhlet sets, distilling apparatus, Dean-Stark, essential-oil and pharmacopoeial determination assemblies in borosilicate glass.

Class A is a tolerance. It is not a calibration.

This distinction costs accredited laboratories real audit findings. Class A volumetric ware carries roughly half the tolerance of Class B and ships with a conformity certificate for the batch. Class AS adds a specified delivery time on pipettes and burettes.

But a conformity certificate is a manufacturing statement, not a traceable calibration. If your laboratory holds a NABL scope, that Class A flask still needs periodic calibration under a volume scope, with a certificate showing the traceability chain. Buying Class A does not discharge the obligation.

Read the TC/“In” and TD/“Ex” markings too — To Contain and To Deliver are not interchangeable, and the calibration temperature (conventionally 20 °C) is on the item for a reason.

On glass: Borosilicate 3.3 is a glass specification under ISO 3585, not a brand. It designates a coefficient of linear expansion of about 3.3 × 10⁻⁶ K⁻¹ — the property that gives thermal shock resistance and chemical durability. Soda-glass equivalents cost less and crack on a hot plate.

On safety: this is the category most often left until after an audit finding. Send us your chemical register and we will size the eyewash provision, map glove chemistry to breakthrough times, and specify a spill kit against the largest container on your shelf rather than against a typical spill.