Bulkglasspack
Clear straight-walled round-shouldered bottle with a blue ribbed cap
Shown configuration · bottle with cap / product, liner, label and documentation not shown

Pharmaceutical primary packaging

Borosilicate Pharma Bottle

A borosilicate bottle meeting the Type I hydrolytic classification, chosen where a formulation would extract alkali from soda-lime glass or where the pack is autoclaved.

Type I classificationAutoclavableLow alkali extraction
Stock status
In stock
Lead time
2–3 weeks
FOB price / pc
$0.85 - $1.30
MOQ
3,000 pcs
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Final availability, dimensions, materials, assembled components and commercial terms are confirmed against the selected drawing and approved sample.

Type I is a test result

Hydrolytic class, not a marketing word

Treated glass is a third option

Type II sits between I and III

Surface durability is separate

Delamination is its own question

Borosilicate Pharma Bottle profile

Type I is a measured property, and knowing what it does and does not cover saves a great deal of argument.

Hydrolytic classification, surface treatment & durability

Five distinctions that keep a glass specification honest.

Pharmaceutical glass is classified by how much alkali it releases into water under defined conditions. Borosilicate reaches Type I, treated soda-lime reaches Type II and untreated soda-lime is Type III. Choosing between them is a formulation decision, and it does not settle every glass question — inner-surface durability is assessed separately.

01

The classes describe a test, not a material claim

Hydrolytic resistance is measured by extracting crushed glass or a filled container under defined conditions and titrating what came out. ISO 719 runs at 98 °C and ISO 720 at 121 °C, and the pharmacopeial Type I, II and III designations rest on that kind of measurement. A glass is Type I because it passed a test, not because of its name.

02

Type II is treated soda-lime, and treatment can wear

Type II is soda-lime glass whose inner surface has been treated, typically with ammonium sulfate at high temperature, to strip sodium from the surface layer. That gives Type I-like surface performance at soda-lime cost. The treated layer is thin, so repeated autoclaving or aggressive contents can work through it in a way that bulk borosilicate does not experience.

03

Surface durability is a different question from class

A container can pass its hydrolytic test and still shed glass flakes into a formulation over time, which is why inner-surface durability is evaluated on its own. Low surface alkalinity from a sulfate treatment does not guarantee resistance to that. Formulations at extreme pH, and long storage, are where the distinction becomes practical rather than academic.

04

Autoclaving is where borosilicate earns its cost

Low thermal expansion lets a borosilicate bottle go through repeated sterilization cycles without the stress that cracks soda-lime, and the bulk composition means no surface treatment can be exhausted. For a pack that is sterilized in-house, repeatedly or at scale, that is often the deciding factor rather than the extraction figure.

05

The closure is still the weakest chemical link

Type I glass resists nearly everything a pharmaceutical formulation contains, and the cap liner does not. Extractables, sorption of preservatives and moisture transmission all happen at the closure. Specifying Type I glass and then accepting a default liner is a common inconsistency, and it is usually the liner that turns up in a stability investigation.

06

Delamination is a surface phenomenon with a long fuse

Glass in contact with certain formulations can shed thin flakes from its inner surface after months, and the conditions that cause it are set during forming rather than during filling. It is found by extended storage study on the actual product, and it is one of the reasons a container is qualified rather than simply purchased.

Application guide

Borosilicate is specified for chemistry, not for looks.

Choosing borosilicate over standard soda-lime is a decision about hydrolytic resistance and thermal behavior, made because a formulation or a process demands it. These are development directions confirmed against the material specification.

Borosilicate Pharma Bottle used for products that interact with ordinary glass in a sensitive formulations setting

Sensitive formulations

Products that interact with ordinary glass

For preparations where ions leaching from the container would alter pH or degrade an active over shelf life, which is precisely the situation borosilicate is selected to avoid. The requirement comes from stability work on the formulation, and it should be documented alongside the material choice.

  • Establish the need from stability data
  • Specify the glass type explicitly
  • Retain material documentation
Borosilicate Pharma Bottle used for filled bottles taken up to temperature and back in a autoclave loads setting

Autoclave loads

Filled bottles taken up to temperature and back

For the technicians loading a chamber and unloading it an hour later, where every bottle has been through a steep climb and a steeper cooldown. Borosilicate takes that gradient better than soda-lime, but the cycle has to be written down first, because the shape matters as much as the material.

  • Define the actual thermal cycle
  • Confirm the design tolerates it
  • Test filled containers, not empty
Borosilicate Pharma Bottle used for an auditor asking to see the certificate in a supplier audits setting

Supplier audits

An auditor asking to see the certificate

For the day someone from a customer's quality group sits down and asks which lot a bottle came from and what the material was. Nobody can tell borosilicate from soda-lime by handling a finished bottle, so the answer lives entirely in the paperwork, which makes it part of what is being bought.

  • Require material certification per batch
  • Confirm traceability to the lot
  • Keep documentation with the specification

Applications describe development directions. Material grade, sterility, seal performance and regulatory outcomes are confirmed for the selected program.

Common questions

Borosilicate Pharma Bottle questions

Glass classification is precise. These questions keep the terms straight.

Is Type II as good as Type I?

For surface performance at first use, often yes, and it is soda-lime glass whose inner surface has been treated to strip sodium from a thin layer. The layer is thin, so repeated autoclaving or aggressive contents can work through it, whereas borosilicate's resistance is a bulk property that cannot be exhausted. The difference shows up over time rather than immediately.

When is borosilicate clearly worth the money?

When the pack is autoclaved, especially repeatedly or at scale. Low thermal expansion avoids the stress that cracks soda-lime, and there is no surface treatment to exhaust. For in-house sterilization that is usually the deciding factor, more so than the extraction figures that dominate the discussion when the pack is filled cold.

If we specify Type I glass, are we covered chemically?

Only on the glass. Type I resists nearly everything in a pharmaceutical formulation; the cap liner does not, and extractables, preservative sorption and moisture transmission all happen there. Specifying Type I and then accepting a default liner is a common inconsistency, and the liner is usually what appears in the subsequent stability investigation.

How quickly does delamination appear?

Slowly — it has a long fuse. Glass flakes come from a surface reaction that develops over months of contact, so a formulation that looks fine at release can show particles late in shelf life. It has to be screened for on real-time stability.

Next step

Send us the Borosilicate Pharma Bottle brief.

Tell us the product, fill volume, closure preference and destination market. We will come back with the matching drawings, available configurations and a sample plan before anything is quoted.

Request a project quote Talk to the team
  • 01Send the briefProduct, volume, closure and market
  • 02Get the optionsMatching drawings and configurations
  • 03Approve the sampleConfirm the pack before production