午夜插插,噜噜噜影院,啪啪伊人网,欧美熟夫,景甜吻戏视频,男人强操性感蕾丝美女视频在线网站,日本美女跳舞视频

??-???

??-???
??-??? ??? ???
?? ??:
84380-01-8
???:
??-???
???(??):
??-???
???:
alpha-Arbutin
???(??):
Alpha Arbutin Powder;α-Arbutin;a-Arbutin;4-hydroquinone-alpha-d-glucopyranoside;(2R,3S,4S,5R,6S)-2-(HYDROXYMETHYL)-6-(4-HYDROXYPHENOXY)TETRAHYDROPYRAN-3,4,5-TRIOL;(2R,3S,4S,5R,6R)-2-(Hydroxymethyl)-6-(4-hydroxyphenoxy)tetrahydro-2H-pyran-3,4,5-triol;LGB-AA;αRBUTIN;Alpha bear;alpha rbutin
CBNumber:
CB3855311
???:
C12H16O7
??? ??:
272.25
MOL ??:
84380-01-8.mol
MSDS ??:
SDS

??-??? ??

???
195-196°C
?? ?
561.6±50.0 °C(Predicted)
??
1.556±0.06 g/cm3(Predicted)
?? ??
2-8°C
???
DMSO(?? ???), ???(?? ???)
??? ??
??
??? ??
??? ??
?? ?? (pKa)
10.10±0.15(Predicted)
??
???? ?????
BRN
89675
InChI
InChI=1/C12H16O7/c13-5-8-9(15)10(16)11(17)12(19-8)18-7-3-1-6(14)2-4-7/h1-4,8-17H,5H2/t8-,9-,10+,11-,12+/s3
InChIKey
BJRNKVDFDLYUGJ-ZIQFBCGOSA-N
SMILES
O(C1C=CC(O)=CC=1)[C@@H]1[C@@H]([C@@H](O)[C@H](O)[C@@H](CO)O1)O |&1:8,9,10,12,14,r|
CAS ??????
84380-01-8(CAS DataBase Reference)
??
  • ?? ? ?? ??
  • ?? ? ???? ?? (GHS)
WGK ?? 3
HS ?? 2938.90.0000
????(GHS): GHS hazard pictograms
?? ?: Warning
??·?? ??:
?? ??·?? ?? ?? ?? ?? ?? ? ?? ?? P- ??
H302 ??? ??? ?? ?? ?? - ?? ?? 4 ?? GHS hazard pictograms P264, P270, P301+P312, P330, P501
H315 ??? ??? ??? ????? ?? ????? ?? 2 ?? GHS hazard pictograms P264, P280, P302+P352, P321,P332+P313, P362
H319 ?? ?? ??? ??? ?? ? ?? ?? ??? ?? ?? 2A ?? GHS hazard pictograms P264, P280, P305+P351+P338,P337+P313P
H335 ?? ???? ??? ? ?? ?? ???? ?? - 1? ??;???? ?? ?? 3 ?? GHS hazard pictograms
??????:
P261 ??·?·??·???·??·...·????? ??? ????.
P264 ?? ??? ?? ??? ????.
P264 ?? ??? ?? ??? ????.
P270 ? ??? ??? ??? ???, ???? ???? ???.
P271 ?? ?? ??? ? ?? ???? ?????.
P280 ????/???/???/?????? ?????.
P301+P312 ??? ???? ??? ????(??)? ??? ????.
P302+P352 ??? ??? ??? ?? ????.
P304+P340 ???? ??? ??? ?? ??? ??? ???? ?? ??? ??? ????.
P305+P351+P338 ?? ??? ? ?? ?? ???? ????. ???? ?????? ?????. ?? ????.
P330 ?? ?????.
P332+P313 ?? ??? ??? ???? ??· ??? ????.
P337+P313 ?? ?? ??? ???? ???? ??· ??? ????.
P362 ??? ??? ?? ?? ?? ?????
P403+P233 ??? ??? ? ?? ?? ??? ???? ?????.
P405 ???? ?????.
P501 ...? ??? / ??? ?? ???.
NFPA 704
0
2 0

??-??? C??? ??, ??, ??

??

Arbutin is naturally found in plant sources such as Bearberry, Cranberry and Mulberry, which essentially prevents the formation of melanin (the pigment that creates skin colour). The chemically synthesised version of this plant extract is known as Alpha Arbutin which is used as a topical skin brightening agent to treat sun spots, pigmentation and scars caused by sun damage and breakouts. It also has antioxidant properties, which protect the skin from potential sun damage. Along with Retinol, it is a fairly common ingredient in anti-ageing products to treat age spots, fine lines and wrinkles. alpha-Arbutin-1.jpg

??? ??

alpha-Arbutin is White Solid

??

alpha-Arbutin is a component used in the skin-whitening cosmetics.

??

Alpha arbutin, also called Hydroquinone β-D-glucopyranoside, is a naturally occurring antioxidant and skin brightener that is naturally found in the bearberry plant. It reduces melanin formation, improving the appearance of age spots, freckles, melasma, and post-inflammatory pigmentation.

benefits

Ensures an even skin tone after only one month;Reduces the degree of skin tanning after UV exposure;Helps to minimize the appearance of liver spots.

Biological Functions

Alpha arbutin acts as a tyrosinase competitive inhibitor and also slows melanosome maturation (the organelles that synthesize and store melanin or pigment).3 This is significant because it works on two different mechanisms of pigmentation. Melanin is derived from the amino acid tyrosine and this conversion is regulated by the enzyme tyrosinase. Alpha arbutin is similar in structure to tyrosine, which fits into tyrosinase, needed for melanogenesis. This means that alpha arbutin is reversibly competing with tyrosine for a spot on the enzyme and not inhibiting cell viability, so therefore is not cytotoxic. By targeting tyrosinase, the rate-limiting enzyme in melanin formation, as well as slowing production of the organelles that produce melanin, alpha arbutin is a potent skin brightening agent.

?? ??

α-Arbutin is a glycosylated hydroquinone and an anomer of naturally occurring arbutin. It is a potent inhibitor of tyrosinase, a vital enzyme involved in epidermal melanin biosynthesis. α-Arbutin finds extensive application as a powerful skin-lightening agent in cosmetic industries.

Mechanism of action

Alpha arbutin is frequently marketed as a safer alternative to hydroquinone (a popular skin-lightening ingredient that has been banned in Europe and Australia). It has similar results in brightening skin but without the dangerous bleaching process. Instead, it reduces skin’s pigment production by suppressing the enzymes that stimulate melanin. This also slows down the process by which UV light causes pigmentation, so it both prevents and treats pigmentation issues.

???

Alpha arbutin is an active compound. Using too many active agents together can cause harshness to your skin.
For sensitive skin, using too much product containing alpha arbutin can cause a burning sensation on your face or skin.
Using moisturisers just after applying alpha arbutin cream or gel may not work well on your skin. It is a light compound which does not absorb well into the skin if topped over a moisturiser.
Alpha arbutin side effects occur when applied on cracked skin. It is suitable for topical use but when it comes in contact with an exposed wound, it causes unbearable irritation.

??-??? ?? ?? ? ???

???

?? ??


??-??? ?? ??

???( 676)?? ??
??? ?? ??? ?? ?? ? ??
Huzhou Haipu Chemical Co.,Ltd
+86-0572 2526078; +8613757061525
xatyang@acetylacetone.net China 21 58
Watson Biotechnology Co.,Ltd
+86-18186686046 +86-18186686046
sales01@watsonbiotech.cn China 5848 58
Hefei TNJ Chemical Industry Co.,Ltd.
+86-0551-65418679 +8618949832763
info@tnjchem.com China 2986 55
ZhenYiBio Technology Inc
+8615309206328
alexxue@zhenyibio.com China 298 58
Sinoway Industrial co., ltd.
0592-5800732; +8613806035118
xie@china-sinoway.com China 987 58
LEAP CHEM CO., LTD.
+86-852-30606658
market18@leapchem.com China 24727 58
Hebei Shengyang Water Conservancy Engineering Co., Ltd.
+8615373025980
clara@hbshengyang.com China 822 58
Chongqing Zhihe Biopharmaceutical Co., Ltd.
+86-18580541567 +86-17782035140
sales@zhswyy.com China 212 58
Wuhan Fortuna Chemical Co.,Ltd
+8618007136271
hk@fortunachem.com China 5992 58
Hangzhou Lin'an tianhong biotechnology co.,ltd.
+86-0571-58605786 +8613858113248
admin@tianhongsw.com China 49 58

??-??? ?? ??:

Copyright 2019 ? ChemicalBook. All rights reserved