CAS 1034343-98-0 Graphene Quantum Dots (GQDs), Aqua-Green Luminescent

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Graphene Quantum Dots (GQDs), Aqua-Green Luminescent

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Catalog Number

ACM1034343980-25

CAS Number

1034343-98-0

Product Name

Graphene Quantum Dots (GQDs), Aqua-Green Luminescent

Structure

Category

Graphenes

Description

Methane is a colorless odorless gas. It is also known as marsh gas or methyl hydride. It is easily ignited. The vapors are lighter than air. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket. It is used in making other chemicals and as a constituent of the fuel, natural gas.;Methane is a colorless odorless gas. It is also known as marsh gas or methyl hydride. It is easily ignited. The vapors are lighter than air. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket. It is used in making other chemicals and as a constituent of the fuel, natural gas.;Methane, refrigerated liquid (cryogenic liquid) is a colorless odorless liquid. Flammable. Water insoluble.;Natural gas, refrigerated liquid (cryogenic liquid) appears as a flammable liquefied gaseous mixture of straight chain hydrocarbons, predominately methane.;Natural gas, [compressed] appears as a flammable gaseous mixture of straight chain hydrocarbons, predominately compressed methane.;GasVapor; Liquid;Liquid;COLOURLESS ODOURLESS COMPRESSED OR LIQUEFIED GAS.

IUPAC Name

methane

Molecular Weight

16.043g/mol

Molecular Formula

CH4;CH4;CH4

Canonical SMILES

InChI

InChI=1S/CH4/h1H4

InChI Key

VNWKTOKETHGBQD-UHFFFAOYSA-N

Boiling Point

-258 °F at 760 mm Hg (USCG, 1999);-258.7 °F at 760 mm Hg (NTP, 1992);-161.5 °C;-161.50 °C;-161 °C

Melting Point

-296 °F (USCG, 1999);-296.5 °F (NTP, 1992);-182.4 °C;-182.566 °C;-182.4°C;-183 °C

Flash Point

-306 °F (NTP, 1992);-188 °C (-306 °F) - closed cup;Flammable gas

Density

0.415 to 0.45 at -259.6 °F (USCG, 1999);0.422 at -256 °F (USCG, 1999);0.554 at 0 °C/4 °C (air = 1 ) or 0.7168 g/liter

Solubility

3.5 mL/100 mL at 63° F (NTP, 1992);Insoluble;0.00 M;In water, 22 mg/L at 25 °C;Slightly soluble in acetone; soluble in ethanol, ethyl ether, benzene, toluene, methanol;0.91 mL in 1 g ether at 20 °C; 0.60 mL in 1 g ethyl alcohol at 20 °C;0.022 mg/mL at 25 °C;Solubility in water, ml/100ml at 20 °C: 3.3

Color/Form

Colorless gas

Complexity

Covalently-Bonded Unit Count

EC Number

200-812-7;232-343-9

Exact Mass

16.0313g/mol

Formal Charge

Heat of Vaporization

8.19 kJ/mol

Heavy Atom Count

ICSC Number

0291

Log P

log Kow = 1.09;1.09;1.09

Monoisotopic Mass

16.0313g/mol

Odor

Odorless;Weak odor

Other Experimental

VP: 1 Pa at -220 °C (solid); -10 Pa at 214.2 °C (solid); 100 Pa at -206.8 °C (solid); 1 kPa at -197 °C (solid); 10 kPa at -183.6 °C (solid); 100 kPa at -161.7 °C;Burns with a pale, faintly luminous flame; air containing more than 14% methane burns without noise;Practically inert toward sulfuric acid, nitric acid, alkalies, and salts but reacts with chlorine and bromine in light (explosively in direct sunlight);Liquid water interfacial tension: 50 dynes/cm = 0.050 N/m at -161 °C; Ratio of specific heats of vapor: 1.306;Enthalpy of fusion: 0.94 kJ/mol;Dipole moment: 0;Enthalpy of formation: -74.6 kJ/mol at 298.15 K;Henry's Law constant = 0.658 atm-cu m/mol at 25 °C (est);Hydroxyl radical reaction rate constant: 6.86X10-15 cu cm/molecule sec at 25 °C

Rotatable Bond Count

RTECS Number

PA1490000

UNII

2P3VWU3H10;OP0UW79H66

UN Number

1972;1971;1972;1972;1971;1971;1971;1971

Vapor Density

0.55 (NTP, 1992) (Relative to Air);0.554 at 0 °C (Air = 1);Relative vapor density (air = 1): 0.6

Vapor Pressure

258574 mm Hg at 100 °F ; 760 mm Hg at -258.7° F (NTP, 1992);4.66e+05 mmHg;4.66X10+5 mm Hg at 25 °C

Viscosity

34.8 uP at -181.6 °C; 76.0 uP at -78.5 °C; 102.6 uP at 0 °C; 108.7 uP at 20 °C; 133.1 uP at 100.0 °C; 160.5 uP at 200.5 °C; 181.3 uP at 284 °C; 202.6 uP at 380 °C; 226.4 uP at 499 °C

XLogP3

0.6

MSDS

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COA

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Spec Sheet

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