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Fluorescein aqueous solutions, diluted from 10,000 to 1 parts-per-million in intervals of 10 fold dilution. At 1 ppm the solution is a very pale yellow. At 1 ppm the solution is a very pale yellow. As the concentration increases the colour becomes a more vibrant yellow, then orange, with the final 10,000 ppm a deep red colour.
Hydrogen deuteride is a minor component of naturally occurring molecular hydrogen. It is one of the minor but noticeable components of the atmospheres of all the giant planets, with abundances from about 30 ppm to about 200 ppm. HD has also been found in supernova remnants, [2] and other sources.
Dicyclopentadiene, abbreviated DCPD, is a chemical compound with formula C 10 H 12. At room temperature, it is a white brittle wax, although lower purity samples can be straw coloured liquids. The pure material smells somewhat of soy wax or camphor, with less pure samples possessing a stronger acrid odor. Its energy density is 10,975 Wh/l.
The abundance of elements in Earth's crust is shown in tabulated form with the estimated crustal abundance for each chemical element shown as mg/kg, or parts per million (ppm) by mass (10,000 ppm = 1%).
A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.
C 5 H 12: pentane: 109-66-0 C 5 H 12 O 2: neopentyl glycol: 101-38-2 C 5 H 12 O 4: pentaerythritol: 115-77-5 C 5 H 12 O 5: xylitol: 87-99-0 C 5 H 13 N N,N-diethylmethylamine: 616-39-7 C 6 F 5 COOH: pentafluorobenzoic acid: 602-94-8 C 6 H 2 Cl 3 NO 2,6-Dichloroquinone-4-chloroimideGibbs reagent C 6 H 3 Br 3 O: 2,4,6-Tribromophenol: C 6 H 3 Cl 3 ...
ppm 1 The concentration at which the general population will experience transient and reversible problems, such as notable discomfort, irritation, or certain asymptomatic non-sensory effects. 0.52 0.17 2 The concentration that results in irreversible or other serious, long-lasting adverse health effects or an impaired ability to escape. 1.6 0.52 3
Glutaraldehyde is an organic compound with the formula (CH 2) 3 (CHO) 2.The molecule consists of a five carbon chain doubly terminated with formyl (CHO) groups. It is usually used as a solution in water, and such solutions exists as a collection of hydrates, cyclic derivatives, and condensation products, several of which interconvert.
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