Chemicals Formula: B

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Monday, January 12, 2009

Betacarotene

Beta-carotene is an organic compound - a terpenoid, a red-orange pigment abundant in plants and fruits. As a carotene with β-rings at both ends, it is the most common form of carotene. It is a precursor (inactive form) of vitamin A. Being highly conjugated, it is deeply colored, and as a hydrocarbon lacking functional groups, it is very lipophilic.

The structure was deduced by Karrer et al. In nature, β-carotene is a precursor to vitamin A via the action of β-carotene dioxygenase. β-carotene is also the substance in carrots that colours them orange. β-Carotenoid is biosynthesized from geranylgeranyl pyrophosphate.

Benzoate

Benzoic acid, C₇H₆O₂ (or C₆H₅COOH), is a colorless crystalline solid and the simplest aromatic carboxylic acid. The name derived from gum benzoin, which was for a long time the only source for benzoic acid. This weak acid and its salts are used as a food preservative. Benzoic acid is an important precursor for the synthesis of many other organic substances.

Benzoic Acid = Asam benzoat

Identifiers
Other names	Carboxybenzene, E210, dracylic acid
CAS number	65-85-0
PubChem	243
KEGG	C00180
MeSH	benzoic+acid
ChEBI	30746
RTECS number	DG0875000
SMILES	[show] `c1ccccc1C(=O)O`
InChI	[show] 1/C7H6O2/c8-7(9)6-4-2-1-3-5-6/h1-5H,(H,8,9)/f/h8H
Beilstein Reference	636131
Gmelin Reference	2946
ChemSpider ID	238
3DMet	B00053
Properties
Molecular formula	C₆H₅COOH
Molar mass	122.12 g/mol
Appearance	Colourless crystalline solid
Density	1.32 g/cm³, solid
Melting point	122.4 °C (395 K)
Boiling point	249 °C (522 K)
Solubility in water	Soluble (hot water) 3.4 g/l (25 °C)
Solubility in THF, ethanol, methanol	THF 3.6 M, ethanol 2.4 M, methanol 2.9 M ^[1]
Acidity (pK_a)	4.21
Structure
Crystal structure	Monoclinic
Molecular shape	planar
Dipole moment	1.72 D in Dioxane

benzene - space-filling model with electric potential

Space-filling model of benzene, displaying its electric potential. Benzene also is known as benzol.

The molecular formula of benzene is C₆H₆.

Benzene

Benzene, or benzol, is an organic chemical compound and a known carcinogen with the molecular formula C₆H₆. It is sometimes abbreviated Ph–H. Benzene is a colorless and highly flammable liquid with a sweet smell and a relatively high melting point. Because it is a known carcinogen, its use as an additive in gasoline is now limited, but it is an important industrial solvent and precursor in the production of drugs, plastics, synthetic rubber, and dyes. Benzene is a natural constituent of crude oil, and may be synthesized from other compounds present in petroleum. Benzene is an aromatic hydrocarbon and the second [n]-annulene ([6]-annulene), a cyclic hydrocarbon with a continuous pi bond.

Basketane Molecular Structure

Chemicals with Strange Names, Fused hydrocarbon rings can result in interesting and sometimes elaborate molecular structures. Chemists often name these structures for similarly-shaped objects. For example, the polycyclic compound basketane resembles a basket.

BARF - tripentafluorophenylborane

Baking soda = Sodium Hidrogen Bikarbonat

Sodium bicarbonate or sodium hydrogen carbonate is the chemical compound with the formula NaHCO₃. Sodium bicarbonate is a white solid that is crystalline but often appears as a fine powder. It has a slight alkaline taste resembling that of washing soda (sodium carbonate). It is a component of the mineral natron and is found dissolved in many mineral springs. The natural mineral form is known as nahcolite. It is also produced artificially.
Wikipedia.org

Chemicals Formula

Monday, January 12, 2009

Chemicals with Strange Names, Fused hydrocarbon rings can result in interesting and sometimes elaborate molecular structures. Chemists often name these structures for similarly-shaped objects. For example, the polycyclic compound basketane resembles a basket.

Pure and Applied Chemistry - I U P A C