7322-31-8

Basic information

• Product Name: β-D-Mannopyranose
• Synonyms: beta-D-mannose
• CAS NO: 7322-31-8
• Molecular Formula: C₆H₁₂O₆
• Molecular Weight: 180.1559
• Mol File: 7322-31-8.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 410.8°Cat760mmHg
• Flash Point: 202.2°C
• Appearance: /
• Density: 1.732g/cm³
• CAS DataBase Reference: β-D-Mannopyranose(CAS DataBase Reference)
• NIST Chemistry Reference: β-D-Mannopyranose(7322-31-8)
• EPA Substance Registry System: β-D-Mannopyranose(7322-31-8)

Safety Data

• Hazardous Substances Data: 7322-31-8(Hazardous Substances Data)

Usage

Definition

ChEBI: A D-mannopyranose in which the anomeric centre has beta-configuration.

InChI:InChI=1/C6H12O6/c7-1-2-3(8)4(9)5(10)6(11)12-2/h2-11H,1H2/t2-,3-,4+,5+,6-/m1/s1

Upstream product

• 6401-81-6 O-β-D-Mannopyranosyl(1->4)-O-β-D-mannopyranosyl(1->4)-D-glucopyranose 
• 29276-55-9 4-O-β-D-mannopyranosyl-D-glucopyranose 
• 50-00-0 formaldehyd 

Downstream Products

• 83-87-4 β-D-mannopyranose pentaacetate 
• 138406-79-8 Benzyl 4,6-O-isopropylidene-α-D-mannopyranoside 
• 138406-81-2 3-tosylmannose-4,6-acetonide 
• 138406-80-1 Toluene-4-sulfonic acid (4aR,6S,7S,8R,8aR)-6-benzyloxy-7-hydroxy-2,2-dimethyl-hexahydro-pyrano[3,2-d][1,3]dioxin-8-yl ester 
• 1393086-00-4 C₁₇H₂₂O₅ 
• 1393085-99-8 benzyl 2,3-O-isopentylidene-α-D-mannofuranoside 
• 1393085-98-7 benzyl 2,3:5,6-di-O-isopentylidene-α-D-mannofuranoside 
• 2936-70-1 (2R,3S,4S,5S,6R)-2-Hydroxymethyl-6-phenylsulfanyl-tetrahydro-pyran-3,4,5-triol 
• 13992-16-0 phenyl 2,3,4,6-tetra-O-acetyl-1-thio-α-D-mannopyranoside 
• 78-98-8 2-oxopropanal 
• 14440-51-8 1,6-anhydro-2,3-O-isopropylidene-β-D-mannopyranose 
• 14168-65-1 mannosan 
• 492-61-5 β-D-glucose 
• 41308-76-3 allyl α-D-mannopyranoside 

Relevant articles and documents

Hydrolysis of konjac glucomannan by Trichoderma reesei mannanase and endoglucanases Cel7B and Cel5A for the production of glucomannooligosaccharides

In this paper we describe the enzymatic hydrolysis of konjac glucomannan for the production of glucomannooligosaccharides using purified Trichoderma reesei mannanase, endoglucanases EGI (Tr Cel7b) and EGII (Tr Cel5a). Hydrolysis with each of the three enzymes produced a different pattern of oligosaccharides. Mannanase was the most selective of the three enzymes in the hydrolysis of konjac mannan and over 99% of the formed oligosaccharides had mannose as their reducing end pyranosyl unit. Tr Cel5A hydrolysate shared similarities with mannanase and Tr Cel7B hydrolysates and the enzyme had the lowest substrate specificity of the studied enzymes. The hydrolysate of Tr Cel7B contained a series of oligosaccharides with non-reducing end mannose (M) and reducing end glucose (G) (MG, MMG, MMMG, and MMMMG). These oligosaccharides were isolated from the hydrolysate by size exclusion chromatography in relatively high purity (86-95%) and total yield (23% of substrate). The isolated oligosaccharides were characterized using acid hydrolysis and HPAEC-PAD (carbohydrate composition), HPLC-RI and HPAEC-MS (to determine the DP of purified oligosaccharides), enzymatic hydrolysis (determination of non-reducing end carbohydrate) and NMR (both 1D and 2D, to verify structure and purity of purified compounds). Hydrolysis of konjac mannan with a specific enzyme, such as T. reesei Cel7B or mannanase, followed by fractionation with SEC offers the possibility to produce glucomannooligosaccharides with defined structure. The isolated oligosaccharides can be utilised as analytical standards, for determination of bioactivity of oligosaccharides with defined structure or as substrates for defining substrate specificity of novel carbohydrate hydrolyzing enzymes.

Synthesis of Sugars and Sugar-Like Products by UV Irradiation of Formaldehyde Absorbed on Zeolites

The formation of sugars and sugar-like substances by UV irradiation of formaldehyde adsorbed on zeolites of type A and X has been demonstrated.The conversion inside or outside the matrix and product distribution depend on the type of zeolite. - Keywords: Formaldehyde, Sugars, Zeolites