1.12939

Lactose Standard 5 %

Certified Reference Material for Karl Fischer Titration Aquastar^®

• Synonym(e): Lactobiose
• Empirische Formel (Hill-System): C₁₂H₂₂O₁₁ · xH₂O
• CAS-Nummer: 10039-26-6
• Molekulargewicht: 342.30 (anhydrous basis)
• UNSPSC-Code: 41116107
• EG-Index-Nummer: 200-559-2
• NACRES: NA.24

Eigenschaften

• Qualität: certified reference material
• Qualitätsniveau: 300
• Agentur: ISO 17025, 17034
• Produktlinie: Aquastar^®
• Form: solid
• Selbstzündungstemp.: 390 °C
• Wirksamkeit: >10000 mg/kg LD₅₀, oral (Rat)
• Methode(n): Karl-Fischer titration: suitable; titration: suitable
• pH-Wert: 4.0-6.5 (20 °C, 100 g/L in H₂O)
• mp (Schmelzpunkt): 202 °C
• Schüttdichte: 500 kg/m³
• Format: neat
• Lagertemp.: 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
• InChIKey: GUBGYTABKSRVRQ-XLOQQCSPSA-N

Beschreibung

Allgemeine Beschreibung

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.

Anwendung

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.

Leistungsmerkmale und Vorteile

• 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

Verpackung

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.

Verlinkung

Replaces: 1.12939.0010

Hinweis zur Analyse

Wassergehalt: 5.00 - 5.20 %
Bestimmungsmethode: coulometrisch nach Karl Fischer
Erweiterte Messunsicherheit: +/- 0.05 %

Rechtliche Hinweise

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

Sicherheitshinweise

• Lagerklassenschlüssel: 11 - Combustible Solids
• WGK: WGK 2
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable