All Photos(2)

Documents

1.12939

Lactose Standard 5 %

Name: Lactose Standard 5 %
Brand: MM

Certified Reference Material for Karl Fischer Titration Aquastar^®

Synonym(s):

Lactose Standard 5 %, Milk sugar, Lactobiose

Sign Into View Organizational & Contract Pricing

All Photos(2)

About This Item

Empirical Formula (Hill Notation):

C₁₂H₂₂O₁₁ · xH₂O

CAS Number:

10039-26-6

Molecular Weight:

342.30 (anhydrous basis)

UNSPSC Code:

41116107

EC Index Number:

200-559-2

NACRES:

NA.24

grade

certified reference material

Quality Level

300

Agency

ISO 17025, 17034

product line

Aquastar^®

form

solid

autoignition temp.

390 °C

potency

>10000 mg/kg LD₅₀, oral (Rat)

technique(s)

Karl-Fischer titration: suitable
titration: suitable

pH

4.0-6.5 (20 °C, 100 g/L in H₂O)

mp

202 °C

bulk density

500 kg/m³

format

neat

storage temp.

15-25°C

InChI

1S/C12H22O11/c13-1-3-5(15)6(16)9(19)12(22-3)23-10-4(2-14)21-11(20)8(18)7(10)17/h3-20H,1-2H2/t3-,4-,5+,6+,7-,8-,9-,10-,11+,12+/m1/s1

InChI key

GUBGYTABKSRVRQ-XLOQQCSPSA-N

Related Categories

Karl Fischer Standards

Physical & Chemical Property Standards

General description

The lactose standard 5% is a solid standard, prepared gravimetrically from high-purity reagents. It is analyzed in an ISO/IEC 17025 and ISO 17034 accredited calibration laboratory. Its water content of 5% is measured by the coulometric Karl Fischer oven method at 150°C with an extraction time of 300 seconds, in accordance with ISO 760.

Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.

Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.

Application

Lactose standard 5% is used as a certified reference material (CRM) for both the coulometric and volumetric Karl Fischer water determinations, with or without the Karl Fischer oven. It is particularly suitable when the working medium used consists of solvents mixtures in which sodium tartrate dihydrate is slightly soluble. And it is used as an oven standard in the preferred temperature range of 140°C -190°C.

Features and Benefits

Available in a secure plastic bottle with the material subjected to stability and homogeneity studies, following ISO 17034 and ISO Guide 35
High-quality offering accurate and reliable results
Accompanied with a comprehensive and batch-specific certificate of analysis (CoA) for an effective quality management system
Measured and qualified in an ISO/IEC 17025 and ISO 17034 accredited laboratory

Packaging

SKU-pack size numbers ending with a "3" are SmartChemicals with an RFID tag on the label for seamless data transfer to the instrument, e.g. xxxxxx1003 or xxxxxxx 4003. More information on www.sigmaaldrich.com/SmartChemicals.

Linkage

Replaces: 1.12939.0010

Analysis Note

Water content: 5.00 - 5.20 %
Measurement method: coulometric according Karl Fischer
extended measuring uncertainly: +/- 0.05 %

Legal Information

AQUASTAR is a registered trademark of Merck KGaA, Darmstadt, Germany

reagent

Product No.

Description

Pricing

Storage Class Code

11 - Combustible Solids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Articles

Titration 4.0

SmartChemicals enable wireless CoA data transfer, reducing human error in titration experiments.

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service