1.07657

Lactose monohydrate

milk sugar, suitable for microbiology

• Synonym(s): Lactose monohydrate, Milk sugar, Lactobiose
• Empirical Formula (Hill Notation): C₁₂H₂₂O₁₁ · xH₂O
• CAS Number: 10039-26-6
• Molecular Weight: 342.30 (anhydrous basis)
• UNSPSC Code: 41106212
• EC Index Number: 200-559-2
• NACRES: NA.74

Properties

• Quality Level: 200
• form: solid
• autoignition temp.: 390 °C
• potency: >10000 mg/kg LD₅₀, oral (Rat)
• pH: 4.0-6.5 (20 °C, 100 g/L in H₂O)
• mp: 202 °C
• solubility: 161 g/L
• bulk density: 500 kg/m³
• application(s): microbiology
• 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

Description

Analysis Note

Identity (IR-spectrum): passes test
Appearance: White to yellowish, finely cristallized powder
Spec. rotation (α 20/D; 10 %; water; calc. on anhydrous substance): +54.4 - +55.9 °
Acidity or alkalinity: passes test
Loss on drying (80 °C, 2 h): ≤ 0.5 %
Water: 4.5 - 5.5 %
Suitability for microbiology: passes test

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 2
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable