tetraoxoosmium

• ChemBase ID: 128756
• Molecular Formular: O4Os
• Molecular Mass: 254.2276
• Monoisotopic Mass: 255.94113848
• SMILES: O=[Os](=O)(=O)=O
• Canonical SMILES: O=[Os](=O)(=O)=O
• InChI: InChI=1S/4O.Os
• InChIKey: VUVGYHUDAICLFK-UHFFFAOYSA-N

NAMES AND DATABASE IDS

Names

• IUPAC name: tetraoxoosmium
• IUPAC Systematic name: Tetraoxoosmium
• IUPAC Traditional name: osmium tetroxide
• Synonyms: ‘Osmic acid’; Osmium(VIII)-oxide; Osmium tetroxide solution; Osmium tetroxide, ~1 wt. % on poly(4-vinylpyridine); Osmium(VIII) oxide on poly(4-vinylpyridine); Osmium tetroxide on poly(4-vinylpyridine); Osmium oxide; Osmium tetroxide, microencapsulated; Os EnCat® 40; Osmiumtetroxide; Osmium tetroxide; Osmium tetroxide; 四氧化锇 溶液; 四氧化锇，负载于 ~1%（重量百分比）聚(4-乙烯吡啶); 聚(4-乙烯吡啶) 负载氧化锇(VIII); 聚(4-乙烯吡啶) 负载四氧化锇; 微胶囊包封四氧化锇; “锇酸"; 氧化锇(VIII); 四氧化锇

Database IDs

• CAS Number: 20816-12-0
• EC Number: 244-058-7
• MDL Number: MFCD00011150
• PubChem SID: 24852535; 24898018; 162223062; 24866110; 24886855; 24851991; 24884370; 24862478; 24886856; 24855156
• PubChem CID: 30318
• Chemspider ID: 28158
• MeSH Name: Osmium+tetroxide
• Wikipedia Title: Osmium_tetroxide

CALCULATED PROPERTIES

• H Acceptors: 4
• H Donor: 0
• LogD (pH = 5.5): -1.4056
• LogD (pH = 7.4): -1.4056
• Log P: -1.4056
• Molar Refractivity: 5.7716 cm^3
• Polarizability: 10.607964 Å^3
• Polar Surface Area: 68.28 Å^2
• Rotatable Bonds: 0
• Lipinski's Rule of Five: true

PROPERTIES

Physical Property

• Solubility: 375 g/100 mL (CCl₄) ; soluble in most organic solvents, ammonium hydroxide, phosphorus oxychloride; 5.70 g/100 mL (10 °C) ; 6.23 g/100 mL (25 °C) in water
• Apperance: crystalline; powder; white volatile solid
• Melting Point: 39.5-41 °C(lit.); 40.25 °C; 41-44 °C
• Boiling Point: 129.7 °C; 130 °C(lit.)
• Flash Point: 39.2 °F; 4 °C
• Density: 0.81 g/mL at 20 °C; 0.811 g/mL at 25 °C; 1.0 g/mL at 20 °C; 1.04 g/mL at 25 °C; 4.9 g/cm^3
• Vapor Pressure: 1.23 psi ( 20 °C); 3.55 psi ( 55 °C); 5.42 psi ( 20 °C); 6.76 psi ( 55 °C); 7 mmHg ( 20 °C)
• Vapor Density: 8.8 (vs air)
• Odor: acrid, chlorine-like

Safety Information

• RTECS: RN1140000
• European Hazard Symbols: Corrosive (C); Flammable (F); Oxidising (O); Toxic (T); Highly toxic (T+); Very toxic (T+)
• UN Number: 2471; 3175; 3286; 3287; UN 2471
• German water hazard class: 1; 3
• Hazard Class: 3; 4.1; 6.1
• Packing Group: 1; 2
• Risk Statements: 11-23/24/25-36/37; 23/24/25; 26/27/28-34; 26/27/28-36/38; 8-23/24/25-40; R26/27/28, R34
• Safety Statements: 16-26-36/37-45; 17-26-27-36/37/39-45; 26-28-36/37-45; 26-45-7/9; 36/37-45; 7/9-26-45; S1/2, S7/9, S26, S45
• EU Index: 076-001-00-5
• GHS Pictograms: GHS02; GHS05; GHS06; GHS08
• GHS Signal Word: Danger
• NFPA704:
  

  0

  4

  1

  OX
• GHS Hazard statements: H225-H301-H315-H319-H330-H334-H335; H300-H310-H314-H330-H334; H301-H311-H314-H330-H334; H301-H311-H331-H351; H301-H312-H315-H318-H330-H334
• GHS Precautionary statements: P210-P260-P284-P301 + P310-P305 + P351 + P338-P310; P260-P264-P280-P284-P301 + P310-P302 + P350; P260-P280-P284-P301 + P310-P305 + P351 + P338-P310; P261-P280-P301 + P310-P311
• Personal Protective Equipment: Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P2 (EN 143) respirator cartridges, type P3 (EN 143) respirator cartridges; Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges; Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges; Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter
• RID/ADR: UN 2471 6.1/PG 1; UN 3175 4.1/PG 2; UN 3286 3/PG 2; UN 3287 6.1/PG 2
• Storage Temperature: 2-8°C

Product Information

• Purity: ≥98.0%; ≥99.9%; 99.8%
• Concentration: 2% in H2O; 2.5 wt. % in tert-butanol; 2.5% in tert-butanol; 4 wt. % in H2O; 4% in H2O
• Grade: ACS reagent; for electron microscopy; puriss.; ReagentPlus®
• Impurities: ≤0.05% non volatile impurities; ≤0.1% non volatile impurities
• Contains: tert-butyl hydroperoxide as stabilizer
• Extent of Labeling: 0.3 mmol/g Os loading
• Clarity of solution: passes test
• Linear Formula: OsO4
• Identification: passes test
• Empirical Formula (Hill Notation): OsO4

DETAILS

Sigma Aldrich - O5500

包装
1 g in ampule
250 mg in ampule

Sigma Aldrich - 75632

Other Notes
Fixativ1

Sigma Aldrich - 365092

Packaging
5, 25 g in glass bottle

Sigma Aldrich - 419494

Packaging
1 g in ampule
250 mg in ampule
Packaged in ampules

Sigma Aldrich - 75630

Other Notes
Review1

Sigma Aldrich - 208868

Packaging
1, 5, 25 mL in glass bottle

Sigma Aldrich - 658685

Features and Benefits
Encapsulated OsO4 catalyst offers safety and handling advantages over conventional OsO4.1
Packaging
1, 5 g in glass bottle
500 mg in glass bottle
Legal Information
Os EnCat® technology.
EnCat is a registered trademark of Reaxa Ltd.

Sigma Aldrich - 201030

Application
Widely used oxidizer for visualizing cells in microscopy. Promotes oxidative cleavage of graphene layers in carbon nanotubes creating the possibility of opening ′windows′ in fullerene cages.1
Packaging
1 g in ampule
250, 500 mg in ampule
Packaged in ampules
Legal Information
ReagentPlus is a registered trademark of Sigma-Aldrich Co. LLC