Is benzoic acid h3btc
Publish: 2021-05-10 13:33:42
1. New people on the road first slowly, look and buy. Let's take a look
2.
Molecular formula: c9h6o6
molecular weight: 210.14
character: acicular or prismatic crystal
standard combustion heat (enthalpy) of crystalline phase (kJ · mol-1): - 3208.96
standard combustion heat (enthalpy) of crystalline phase (kJ · mol-1): - 1190.14
melting point (# 186; C) : 380
flash point: 328 ℃
solubility: soluble in ethanol, soluble in ether, soluble in 40 phr water at 23 ℃
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4. Tri ISO nonyl trimellitate (TINTM)
tri-n-nonyl trimellitate (tnntm)
one is isononyl ester and the other is n-nonyl ester.
tri-n-nonyl trimellitate (tnntm)
one is isononyl ester and the other is n-nonyl ester.
5. NaBH4 can be reced in THF and methanol systems with low yield. In my experience, this aromatic ester of benzene ring can not be reced at all. Adding iodine and zinc chloride is useless, and lithium aluminum hydride is fast and clean
6. "The invasion of darkness" tells about six girls who meet on an adventure trip. They come to an unfathomable cave. However, shortly after they enter the cave, a sudden collapse blocks the entrance of the cave and severs their contact with the outside world. When they explore in the dark, the six girls encounter the monster of the secret cave, who devours people madly. In order to avoid becoming prey, They have to fight these monsters. In order to save themselves, the girls unite, but in the escape, their friends doubt each other. How can they find their way out in the narrow dark cave?
7.
1、 Different barrel length
1, m16a4: the barrel length is 510mm
The length of M4 rifle barrel was 368 mm (14.5 in) The weight of m16a4 was 3.77kg (8.30lbs.) M4 rifle: 2.5 kg (5 lb 10 oz) The aiming equipment of m16a4: m16a4 includes an / peq-5 laser indicator, M68 close combat optical sight (CCO), holographic diffractive mirror (HDS) and an / pvs-14 night vision aiming system2. M4 rifle: M4 has & quot; S-1-3" System (insurance / single shot / three-point shot) trigger, colt m925 carbine with RIS guard, and a large number of tactical accessories
8. Of course, the safety of kushenleng wallet is very high. There is no need to worry about the safety of assets. The safety is guaranteed.
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