Volumetric Flasks – Class A, USP, Certified

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Volumetric Flasks – Class A, USP, Certified

Product and ordering information for Volumetric Flasks – Class A, USP, Certified.  Available in all ISO sizes from 5mL to 2000mL in transparent or amber glass. Supplied with batch number & USP batch certificate. Meets ASTM standards.

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Description

Class A, USP, certified volumetric flasks. These are supplied with a glass stopper with a dripping tip. Available in both transparent and amber color. High contrast blue enamel print on transparent flasks, and white on amber flasks, represent the optimum combination of resistance and readability. Available in all ISO sizes from 5mL to 2000mL. Made of low expansion coefficient, chemically resistant borosilicate 3.3. Volumetric flasks are indispensable for preparing dilutions and standard solutions. All BLAUBRAND® USP volumetric flasks are supplied with a batch number and an accompanying USP batch certificate in the original packaging.

Volumetric instruments according to USP error limits

Companies producing pharmaceutical products for the US market are supervised by US authorities, e.g. the FDA (Food and Drug Administration), and have to meet the requirements of the USP (United States Pharmacopeia). The current USP prescribes in section 31 the use of volumetric instruments with accuracy in accordance to class A of the ASTM standards and list those for volumetric flasks, transfer pipettes and burettes in tables. For graduated pipettes up to and including 10 mL size the error limits are mentioned in the text. BRAND volumetric instruments are manufactured according to the current DIN EN ISO standards. As the construction specifications are differently defined in the DIN EN ISO and ASTM standards, the error limits differ as well. With included USP certificates BRAND confirms for the delivered USP volumetric instruments that the class A error limits according to the USP or, rather, ASTM standards are met.

Every glass volumetric measuring instrument is individually calibrated. Computer-controlled systems ensure maximum precision in a fully automated production line. The final step of this Statistical Process Control is random sampling of finished product according to DIN ISO 3951. The quality management system applied at BRAND, which is certified according to DIN EN ISO 9001, is a combination of process monitoring and random checks with an accepted quality level (AQL) of approximately 0.4.

The batch certificate confirms that ASTM class A error limits required by USP are met. The certificate records the mean value, the standard deviation of the batch and the date of issue (batch number: year of manufacture/batch).

Product No. & Specs



Class A, USP, Certified Volumetric Flasks, Transparent

  Volume
   mL
Error limits
± mL
Stopper size
NS
Qty/Pack
Cat. No.
  5
0.02
10/19
2
36968
  10
0.02
10/19
2
36973
  20
0.02
10/19
2
36975
  25
0.03
10/19
2
36977
  50
0.05
12/21
2
36978
  100
0.08
14/23
2
36979
  200
0.10
14/23
2
36980
  250
0.12
14/23
2
36981
  500
0.20
19/26
2
36982
  1000
0.30
24/29
1
36983
  2000
0.50
29/32
1
36984
• High contrast blue enamel print


Class A, USP, Certified Volumetric Flasks, Amber

  Volume
   mL
Error limits
± mL
Stopper size
NS
Qty/Pack
Cat. No.
  5
0.02
10/19
2
37461
  10
0.02
10/19
2
37462
  20
0.02
10/19
2
37463
  25
0.03
10/19
2
37464
  50
0.05
12/21
2
37465
  100
0.08
14/23
2
37467
  200
0.10
14/23
2
37468
  250
0.12
14/23
2
37469
  500
0.20
19/26
2
37470
  1000
0.30
24/29
1
37471
• High contrast white enamel print

FAQs

What is Boro 3.3 glass?

The abbreviation Boro 3.3 stands for a borosilicate glass type 3.3 as specified in international standard DIN ISO 3585, for applications requiring very good chemical and thermal resistance (including resistance to thermal shock), and high mechanical stability. Typical applications are components for chemical apparatus, round-bottom flasks, and beakers.

What is AR-GLAS®?

AR-GLAS® is a type of soda-lime glass with good chemical and physical properties. Soda-lime glass is the most common type (90%) of manufactured glass. It is suitable for products which are usually subjected to short-term chemical exposure, and to limited thermal stress (e.g. pipettes, culture tubes).

How should I clean my volumetric glassware?

For increased service life it is recommended that you clean your volumetric instruments with:

  • No mechanical abrasion
  • Low alkaline detergents
  • Low temperature: < 70°C
  • Short duration: < 20 minutes

What is the advantage to using glass vs. plastic?

Glass has very good chemical resistance against water, saline solutions, acids, alkalis and organic solvents, and in this respect surpasses the majority of plastics. It is only attacked by hydrofluoric acid, and - at elevated temperatures - by strong alkalis and concentrated phosphoric acid. Further advantages of glass are its dimensional stability, even at elevated temperatures, and its high transparency.

What advantages do amber flasks have?

Amber flasks preserve light-sensitive chemical solutions from UV-radiation. BLAUBRAND® amber flasks are made by diffusion of amber stain into the outer surface of clear glass, so the chemical solution only comes into contact with borosilicate glass 3.3 and not with the amber stain.

What kind of screening ink is used for printing the volumetric glassware?

Blue and white enamel are printed on the outer surface and provide a high contrast and an optimal combination of chemical resistance and legibility for the volumetric glassware.
The amber diffusion stain used for the BLAUBRAND® amber flasks diffuses into the glass surface and can only be removed by abrasion or glass corrosion.

How can the meniscus be easily read?

The volume of a concave meniscus has to be read at the lowest point of the liquid level. Here the lowest point of the meniscus has to touch the upper edge of the graduation mark. For parallax-free adjustment of the meniscus, the pipette is held upright and the observer's eye must be at the same height as the meniscus. In this position the ring mark will appear as a line. If the background is light, a piece of dark paper held behind the instrument immediately beneath the ring or graduation mark will make the meniscus appear darker and more easily readable.

Tech Info

Volumetric Glassware SOP

Literature

Catalog Page
BRAND Class A, USP, Volumetric Glassware
Are Your Glass Volumetric Instruments Accurate?
USP Requirements for Volumetric Instruments

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