Product Index

MAGNESIUM, BROMO[2-(PHENYLMETHOXY)PHENYL]-

Catalog No.: AA007ISG

CAS No.:328000-16-4 MDL No.: MFCD08705262

MF: C13H11BrMgO MW: 287.4348

Pricing and Availability

Benzothiazole,2-(2,6-difluorophenyl)-

Catalog No.: AA007J6F

CAS No.:152993-87-8 MDL No.: MFCD20257660

MF: C13H7F2NS MW: 247.2632

Pricing and Availability

Benzaldehyde,3-(5-acetyl-2-thienyl)-

Catalog No.: AA007J58

CAS No.:893735-33-6 MDL No.: MFCD07775174

MF: C12H10OS MW: 202.2722

Pricing and Availability

5-(5-(METHOXYCARBONYL)(PYRIDIN-3-YL))-FURAN-2-CARBOXYLIC ACID

Catalog No.: AA007J5H

CAS No.:893729-76-5 MDL No.: MFCD30560851

MF: C12H9NO5 MW: 247.2036

Pricing and Availability

[1,1'-Biphenyl]-2-carboxylicacid, 2'-chloro-4'-nitro-

Catalog No.: AA007KU3

CAS No.:26690-08-4 MDL No.:

MF: C13H8ClNO4 MW: 277.6599

Pricing and Availability

4-(2-Hydroxypyrimidin-5-yl)benzaldehyde

Catalog No.: AA007L9S

CAS No.:281234-46-6 MDL No.: MFCD11877021

MF: C16H18N4O MW: 282.3403

Pricing and Availability

Benzenemethanol,4-(6-methoxy-3-pyridazinyl)-

Catalog No.: AA007L9U

CAS No.:281232-94-8 MDL No.: MFCD20233152

MF: C12H12N2O2 MW: 216.2359

Pricing and Availability

3-(Dimethylamino)-1-(6-(3-methoxyphenyl)-7,7a-dihydroimidazo[2,1-b]oxazol-5-yl)prop-2-en-1-one

Catalog No.: AA007LDK

CAS No.:1353119-28-4 MDL No.: MFCD19689139

MF: C17H19N3O3 MW: 313.3511

Pricing and Availability

Poly(oxy-1,4-phenylenecarbonyl)

Catalog No.: AA007MI9

CAS No.:26099-71-8 MDL No.: MFCD01742734

MF: C7H4O2 MW: 120.1055

Pricing and Availability

2-Furancarboxylic acid,5-(3-cyanophenyl)-

Catalog No.: AA007NBE

CAS No.:253679-32-2 MDL No.: MFCD06802005

MF: C12H7NO3 MW: 213.1889

Pricing and Availability

[1,1'-Biphenyl]-3-methanol,2'-nitro-

Catalog No.: AA007NM7

CAS No.:236102-73-1 MDL No.:

MF: C13H11NO3 MW: 229.2313

Pricing and Availability

1,2-Ethanediol, 1,2-bis(4-methylphenyl)-

Catalog No.: AA007O2K

CAS No.:24133-59-3 MDL No.: MFCD25977548

MF: C16H18O2 MW: 242.3129

Pricing and Availability

POLY(EPICHLOROHYDRIN-CO-ETHYLENE OXIDE)

Catalog No.: AA007OCL

CAS No.:24969-10-6 MDL No.:

MF: C5H9ClO2 MW: 136.5768

Pricing and Availability

Benzoic acid,4-(5-methoxy-2-pyridinyl)-

Catalog No.: AA007OSX

CAS No.:223127-53-5 MDL No.: MFCD17677969

MF: C13H11NO3 MW: 229.2313

Pricing and Availability

Magnesium, bromo(3-hexyl-2-thienyl)-

Catalog No.: AA007PCB

CAS No.:228414-98-0 MDL No.: MFCD18253681

MF: C10H15BrMgS MW: 271.5001

Pricing and Availability

4-(Quinolin-3-yl)benzoic acid

Catalog No.: AA007PP9

CAS No.:216059-94-8 MDL No.: MFCD18967811

MF: C17H13NO2 MW: 263.2906

Pricing and Availability

Boronic acid, [(1E)-3-(phenylmethoxy)-1-propenyl]-

Catalog No.: AA007Q42

CAS No.:220194-16-1 MDL No.:

MF: C10H13BO3 MW: 192.0194

Pricing and Availability

Magnesium, bromo(2-ethylphenyl)-

Catalog No.: AA007QCA

CAS No.:21450-63-5 MDL No.: MFCD02260221

MF: C8H9BrMg MW: 209.3661

Pricing and Availability

(S)-4-(1-amino-3-hydroxypropyl)phenol

Catalog No.: AA007QFF

CAS No.:1213129-23-7 MDL No.: MFCD11023565

MF: C9H13NO2 MW: 167.2050

Pricing and Availability

2,5-DICHLOROBENZYLMAGNESIUM CHLORIDE

Catalog No.: AA007QNS

CAS No.:213627-19-1 MDL No.: MFCD06200641

MF: C7H5Cl3Mg MW: 219.7786

Pricing and Availability

Magnesium, bromo(4-methyl-2-pyridinyl)-

Catalog No.: AA007SZV

CAS No.:113170-67-5 MDL No.: MFCD01311500

MF: C6H6BrMgN MW: 196.3275

Pricing and Availability

Heptadecanoic acid, 3-oxo-, ethyl ester

Catalog No.: AA007SWP

CAS No.:112548-17-1 MDL No.:

MF: C19H36O3 MW: 312.4873

Pricing and Availability

4-Bromo-8-ethyl-2-methylquinoline

Catalog No.: AA007TD0

CAS No.:1070879-45-6 MDL No.: MFCD11505129

MF: C12H12BrN MW: 250.1344

Pricing and Availability

Magnesium, bromo[6-(phenylmethoxy)hexyl]-

Catalog No.: AA007UTZ

CAS No.:112026-22-9 MDL No.: MFCD11553155

MF: C13H19BrMgO MW: 295.4984

Pricing and Availability

3,4-DIMETHOXYBENZYLMAGNESIUM CHLORIDE

Catalog No.: AA007V5M

CAS No.:108071-30-3 MDL No.: MFCD02260198

MF: C9H11ClMgO2 MW: 210.9404

Pricing and Availability

Quinoline,3-(2-benzothiazolyl)-

Catalog No.: AA007V7Y

CAS No.:165067-13-0 MDL No.:

MF: C16H10N2S MW: 262.3290

Pricing and Availability

2-(4-Acetylphenyl)benzoic acid

Catalog No.: AA007VGT

CAS No.:107942-87-0 MDL No.: MFCD17170999

MF: C15H12O3 MW: 240.2540

Pricing and Availability

3,5-DICHLOROBENZYLMAGNESIUM CHLORIDE

Catalog No.: AA007W2J

CAS No.:107549-25-7 MDL No.: MFCD01311473

MF: C7H5Cl3Mg MW: 219.7786

Pricing and Availability

Magnesium, bromo(2-ethenylphenyl)-

Catalog No.: AA007W2Q

CAS No.:107531-56-6 MDL No.: MFCD18253583

MF: C8H7BrMg MW: 207.3502

Pricing and Availability

[1,1'-Biphenyl]-4-carboxylicacid, 2'-fluoro-5'-nitro-

Catalog No.: AA007WSJ

CAS No.:103978-33-2 MDL No.: MFCD11932466

MF: C13H8FNO4 MW: 261.2053

Pricing and Availability

3-Pyridinecarboxylicacid, 2-[4-(hydroxymethyl)phenyl]-, methyl ester

Catalog No.: AA007XIY

CAS No.:154352-41-7 MDL No.:

MF: C13H11NO3 MW: 229.2313

Pricing and Availability

4-Quinolinecarboxylicacid, 6-fluoro-2-(4-fluorophenyl)-

Catalog No.: AA007XJ4

CAS No.:1543-31-3 MDL No.: MFCD02741584

MF: C16H9F2NO2 MW: 285.2450

Pricing and Availability

3-Methyl-6-nitro-2H-chromen-2-one

Catalog No.: AA007Y44

CAS No.:103030-08-6 MDL No.: MFCD01941323

MF: C10H7NO4 MW: 205.1669

Pricing and Availability

Zinc, hexyliodo-

Catalog No.: AA007YJX

CAS No.:152329-33-4 MDL No.: MFCD22685787

MF: C6H13IZn MW: 277.4519

Pricing and Availability

2-(3-TRIFLUOROMETHYL-PHENYL)-BENZO[D]THIAZOLE

Catalog No.: AA0080GG

CAS No.:133389-19-2 MDL No.: MFCD05669635

MF: C14H8F3NS MW: 279.2802

Pricing and Availability

Magnesium, bromo[(3,5-dimethylphenyl)methyl]-

Catalog No.: AA0081NP

CAS No.:111823-36-0 MDL No.: MFCD01319908

MF: C9H11BrMg MW: 223.3926

Pricing and Availability

Magnesium, bromo(4-butoxyphenyl)-

Catalog No.: AA0084H0

CAS No.:105580-09-4 MDL No.: MFCD11553168

MF: C10H13BrMgO MW: 253.4186

Pricing and Availability

2-Propenoic acid,2-(acetylamino)-3-(4-methoxyphenyl)-, methyl ester, (2Z)-

Catalog No.: AA0084Q9

CAS No.:105962-56-9 MDL No.: MFCD20528364

MF: C13H15NO4 MW: 249.2625

Pricing and Availability

Propanal,3-(1,1-dimethylethoxy)-

Catalog No.: AA0085TD

CAS No.:104513-14-6 MDL No.: MFCD18848744

MF: C11H24O3 MW: 204.3065

Pricing and Availability

[1,1'-Biphenyl]-4-carboxaldehyde,4'-chloro-3'-(trifluoromethyl)-

Catalog No.: AA0086CE

CAS No.:893637-93-9 MDL No.: MFCD08701460

MF: C14H8ClF3O MW: 284.6609

Pricing and Availability

1,1'-Biphenyl, 4'-bromo-3,4-dimethyl-

Catalog No.: AA0086L4

CAS No.:89346-64-5 MDL No.:

MF: C14H13Br MW: 261.1570

Pricing and Availability

Zinc, chloro(phenylmethyl)-

Catalog No.: AA00877G

CAS No.:89523-63-7 MDL No.: MFCD20489300

MF: C7H7ClZn MW: 191.9635

Pricing and Availability

Magnesium, bromotetradecyl-

Catalog No.: AA008A49

CAS No.:88303-25-7 MDL No.: MFCD11553344

MF: C14H28BrMg MW: 300.5811

Pricing and Availability

6-(Benzo[d][1,3]dioxol-5-yl)picolinic acid

Catalog No.: AA008AX9

CAS No.:887983-53-1 MDL No.: MFCD06410092

MF: C13H9NO4 MW: 243.2149

Pricing and Availability

3-Pyridinecarboxylicacid, 6-[4-(ethylthio)phenyl]-

Catalog No.: AA008AXI

CAS No.:887976-40-1 MDL No.: MFCD06410411

MF: C14H13NO2S MW: 259.3235

Pricing and Availability

3-Pyridinecarboxylicacid, 6-[3,5-bis(trifluoromethyl)phenyl]-

Catalog No.: AA008AXJ

CAS No.:887976-37-6 MDL No.: MFCD06410422

MF: C14H7F6NO2 MW: 335.2013

Pricing and Availability

(4'-Fluoro-3'-methyl-[1,1'-biphenyl]-4-yl)methanol

Catalog No.: AA008B0C

CAS No.:885964-14-7 MDL No.: MFCD06858720

MF: C14H13FO MW: 216.2508

Pricing and Availability

[1,1'-Biphenyl]-4-carboxaldehyde,3'-chloro-4'-methyl-

Catalog No.: AA008B7Q

CAS No.:885963-06-4 MDL No.: MFCD06858690

MF: C14H11ClO MW: 230.6895

Pricing and Availability

(3',4'-Dichloro-[1,1'-biphenyl]-4-yl)methanol

Catalog No.: AA008B80

CAS No.:885949-98-4 MDL No.: MFCD01862512

MF: C13H10Cl2O MW: 253.1239

Pricing and Availability

Magnesium,chloro[3-(2,5,5-trimethyl-1,3-dioxan-2-yl)propyl]-

Catalog No.: AA008C66

CAS No.:88128-60-3 MDL No.: MFCD06797441

MF: C10H19ClMgO2 MW: 231.0147

Pricing and Availability

Benzothiazole,2-[3-(trifluoromethoxy)phenyl]-

Catalog No.: AA008CQC

CAS No.:874739-16-9 MDL No.: MFCD16878815

MF: C14H8F3NOS MW: 295.2796

Pricing and Availability

2-Pyridinecarbonitrile,5-(4-formylphenyl)-

Catalog No.: AA008E44

CAS No.:869767-74-8 MDL No.:

MF: C12H9NO2 MW: 199.2054

Pricing and Availability

Magnesium, bromohexadecyl-

Catalog No.: AA008EUT

CAS No.:872-26-4 MDL No.: MFCD20919603

MF: C16H32BrMg MW: 328.6343

Pricing and Availability

Phenol, 3-(diphenylphosphinyl)-2-iodo-

Catalog No.: AA008EYF

CAS No.:854937-67-0 MDL No.: MFCD20528374

MF: C18H14IO2P MW: 420.1808

Pricing and Availability

2-Pyridinecarboxylicacid, 6-(4-ethylphenyl)-

Catalog No.: AA008F6G

CAS No.:86696-39-1 MDL No.: MFCD16314250

MF: C14H13NO2 MW: 227.2585

Pricing and Availability

1H-Inden-1-one,2,3-dihydro-6-[4-(hydroxymethyl)phenyl]-

Catalog No.: AA008FZ7

CAS No.:864871-35-2 MDL No.: MFCD16878572

MF: C15H13NO MW: 223.2698

Pricing and Availability

3-Fluoro-4'-formyl-[1,1'-biphenyl]-4-carbonitrile

Catalog No.: AA008GBC

CAS No.:851340-77-7 MDL No.: MFCD13193388

MF: C14H8FNO MW: 225.2178

Pricing and Availability

5-(4-(Trifluoromethoxy)phenyl)picolinic acid

Catalog No.: AA008GBK

CAS No.:851266-72-3 MDL No.: MFCD16877960

MF: C13H8F3NO3 MW: 283.2027

Pricing and Availability

Benzamide, N-[4-methyl-3-(4-morpholinylsulfonyl)phenyl]-2-phenoxy-

Catalog No.: AA008GBP

CAS No.:851212-80-1 MDL No.:

MF: C24H24N2O5S MW: 452.5228

Pricing and Availability

Hexadecanoic acid, 12-hydroxy-

Catalog No.: AA008IK5

CAS No.:83646-62-2 MDL No.:

MF: C16H32O3 MW: 272.4235

Pricing and Availability

6-(Naphthalen-2-yl)picolinic acid

Catalog No.: AA008L3F

CAS No.:811470-25-4 MDL No.: MFCD18207567

MF: C16H11NO2 MW: 249.2640

Pricing and Availability

Zinc, chloro-3-pyridinyl-

Catalog No.: AA008LOL

CAS No.:81745-82-6 MDL No.: MFCD28103504

MF: C5H4ClNZn MW: 178.9250

Pricing and Availability

2-hydroxy-4,4,6-trimethyl-1,3,2-dioxaborinane

Catalog No.: AA008MDY

CAS No.:78-60-4 MDL No.: MFCD28045468

MF: C6H13BO3 MW: 143.9766

Pricing and Availability

6-Chloro-N-(p-tolyl)pyridazin-3-amine

Catalog No.: AA008MJF

CAS No.:79232-88-5 MDL No.: MFCD00179958

MF: C11H10ClN3 MW: 219.6702

Pricing and Availability

2-Furancarboxylic acid,5-[3-(aminosulfonyl)phenyl]-

Catalog No.: AA008MWP

CAS No.:773869-38-8 MDL No.: MFCD05625626

MF: C11H9NO5S MW: 267.2579

Pricing and Availability

4-(4,6-Dimethoxypyrimidin-2-yl)benzaldehyde

Catalog No.: AA008NH0

CAS No.:77232-34-9 MDL No.: MFCD28049087

MF: C13H12N2O3 MW: 244.2460

Pricing and Availability

2-Pyridinecarboxylicacid, 6-(4-nitrophenyl)-

Catalog No.: AA008NQ4

CAS No.:80021-26-7 MDL No.: MFCD07786338

MF: C12H8N2O4 MW: 244.2029

Pricing and Availability

2,3-DIMETHOXYBENZYLMAGNESIUM CHLORIDE

Catalog No.: AA008PMQ

CAS No.:738580-42-2 MDL No.: MFCD02260193

MF: C9H11ClMgO2 MW: 210.9404

Pricing and Availability

4-TRIFLUOROMETHYLBENZYLZINC CHLORIDE

Catalog No.: AA008PMS

CAS No.:738580-34-2 MDL No.: MFCD07698712

MF: C8H6ClF3Zn MW: 259.9614

Pricing and Availability

2,5-DIMETHOXYPHENYLZINC IODIDE

Catalog No.: AA008PMR

CAS No.:738580-37-5 MDL No.: MFCD07698715

MF: C8H9IO2Zn MW: 329.4403

Pricing and Availability

Nonanoic acid, 8-hydroxy-

Catalog No.: AA008PSS

CAS No.:75544-92-2 MDL No.: MFCD20649164

MF: C9H18O3 MW: 174.2374

Pricing and Availability

5-ACETOXYPENTYLZINC BROMIDE

Catalog No.: AA008PYM

CAS No.:737797-40-9 MDL No.: MFCD02260176

MF: C7H13BrO2Zn MW: 274.4609

Pricing and Availability

2,3-DIMETHOXYBENZYLZINC CHLORIDE

Catalog No.: AA008PYP

CAS No.:737797-22-7 MDL No.: MFCD02260140

MF: C9H11ClO2Zn MW: 252.0154

Pricing and Availability

Magnesium, bromo(4-methylpentyl)-

Catalog No.: AA008QEE

CAS No.:7429-94-9 MDL No.: MFCD11553303

MF: C6H13BrMg MW: 189.3764

Pricing and Availability

2-CHLORO-N-(5'-HYDROXYNAPHTHALEN-1'-YL)-ACETAMIDE

Catalog No.: AA008R2A

CAS No.:118639-06-8 MDL No.: MFCD02684087

MF: C12H10ClNO2 MW: 235.6663

Pricing and Availability

(S)-(9H-Fluoren-9-yl)methyl (3-(4-(benzyloxy)phenyl)-1-chloro-1-oxopropan-2-yl)carbamate

Catalog No.: AA008S6C

CAS No.:103321-60-4 MDL No.: MFCD00235838

MF: C31H26ClNO4 MW: 511.9954

Pricing and Availability

FMOC-CYS(BZL)-CL

Catalog No.: AA008S6F

CAS No.:103321-55-7 MDL No.: MFCD00235808

MF: C25H22ClNO3S MW: 451.9651

Pricing and Availability

FMOC-L-PROLYL CHLORIDE

Catalog No.: AA008S6N

CAS No.:103321-52-4 MDL No.: MFCD00235831

MF: C20H18ClNO3 MW: 355.8148

Pricing and Availability

Benzenepropanoic acid,2-[2-hydroxy-3-[(1-methylethyl)amino]propoxy]-, ethyl ester

Catalog No.: AA008YFW

CAS No.:102203-23-6 MDL No.: MFCD28144519

MF: C17H27NO4 MW: 309.4006

Pricing and Availability

FMOC-HIS(FMOC)-OPFP

Catalog No.: AA008YWY

CAS No.:114616-10-3 MDL No.: MFCD00077058

MF: C42H28F5N3O6 MW: 765.6802

Pricing and Availability

3-(2-Chloro-4-nitrophenyl)benzoic acid

Catalog No.: AA008Z2L

CAS No.:103978-24-1 MDL No.: MFCD11932465

MF: C13H8FNO4 MW: 261.2053

Pricing and Availability

4-(3-Chloro-2-fluorophenyl)benzoic acid

Catalog No.: AA008Z2N

CAS No.:107517-13-5 MDL No.: MFCD11932293

MF: C14H11ClO3 MW: 262.6883

Pricing and Availability

2,6-Di(4-carboxyphenyl)pyridine

Catalog No.: AA008Z2R

CAS No.:1099-06-5 MDL No.:

MF: C19H13NO4 MW: 319.3108

Pricing and Availability

2-(2,6-Difluorophenyl)-4-quinolinecarboxylic acid

Catalog No.: AA008Z2S

CAS No.:1041604-33-4 MDL No.: MFCD13355189

MF: C16H9F2NO2 MW: 285.2450

Pricing and Availability

(3aS,5S,11bS)-7-Hydroxy-5-methyl-3aH-benzo[g][1,3]dioxolo[4,5-c]isochromene-2,6,11(5H,11bH)-trione

Catalog No.: AA008Z9C

CAS No.:11048-15-0 MDL No.: MFCD00865583

MF: C15H10O7 MW: 302.2357

Pricing and Availability

Fmoc-Gly-ODhbt

Catalog No.: AA008ZDO

CAS No.:114119-87-8 MDL No.: MFCD00235813

MF: C24H18N4O5 MW: 442.4235

Pricing and Availability

2,6-DifluorobenzylMagnesiuM broMide, 0.25M in 2-MeTHF

Catalog No.: AA00906W

CAS No.:107549-26-8 MDL No.: MFCD11113508

MF: C7H5BrF2Mg MW: 231.3204

Pricing and Availability

6-amino-1-methyl-1H-indole-3-carboxylic acid

Catalog No.: AA0091S0

CAS No.:1058740-80-9 MDL No.: MFCD20660048

MF: C10H10N2O2 MW: 190.1986

Pricing and Availability

(betaR)-beta-Cyclopentyl-4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazole-1-propanenitrile (2Z)-2-butenedioate

Catalog No.: AA00925C

CAS No.:1092939-15-5 MDL No.: MFCD13184801

MF: C21H22N6O4 MW: 422.4372

Pricing and Availability

4-Bromo-5-chloro-8-methylquinoline

Catalog No.: AA0093B9

CAS No.:1070879-41-2 MDL No.: MFCD11505124

MF: C10H7BrClN MW: 256.5263

Pricing and Availability

2-(tert-Butyl)-2,3-dihydro-1H-isophosphindole 2-oxide

Catalog No.: AA00950G

CAS No.:104229-83-6 MDL No.: MFCD20528373

MF: C12H17OP MW: 208.2365

Pricing and Availability

benzyl octahydrocyclopenta[b]pyrrole-2-carboxylate hydrochloride

Catalog No.: AA00950H

CAS No.:1042674-26-9 MDL No.: MFCD06795932

MF: C15H20ClNO2 MW: 281.7778

Pricing and Availability

3-AMINO-3-(2,3-DIMETHYLPHENYL)PROPAN-1-OL

Catalog No.: AA00967K

CAS No.:1201907-22-3 MDL No.: MFCD16744676

MF: C11H17NO MW: 179.2588

Pricing and Availability

8-(4-([1,2,4]Triazolo[1,5-a]pyridin-6-yl)-3-(6-methylpyridin-2-yl)-1H-pyrazol-1-yl)-2-oxaspiro[4.5]decan-1-one

Catalog No.: AA0099AE

CAS No.:1097729-66-2 MDL No.: MFCD24038982

MF: C24H24N6O2 MW: 428.4864

Pricing and Availability

Chromic acid (H2CrO4), magnesium salt (1:1)

Catalog No.: AA009AI0

CAS No.:13423-61-5 MDL No.: MFCD00036269

MF: CrMgO4 MW: 140.2987

Pricing and Availability

ACETAZOLAMIDE SODIUM

Catalog No.: AA009AO0

CAS No.:1424-27-7 MDL No.: MFCD01671159

MF: C4H6N4NaO3S2 MW: 245.2352

Pricing and Availability

11-Ferrocenyl-1-Undecanethiol

Catalog No.: AA009D3V

CAS No.:127087-36-9 MDL No.: MFCD20264873

MF: C21H32FeS MW: 372.3888

Pricing and Availability

4-N-PENTYLPHENYLMAGNESIUM BROMIDE

Catalog No.: AA009E4A

CAS No.:124388-30-3 MDL No.: MFCD06200640

MF: C11H15BrMg MW: 251.4458

Pricing and Availability

N-OCTYLZINC BROMIDE

Catalog No.: AA009FFA

CAS No.:131379-13-0 MDL No.: MFCD07698727

MF: C8H17BrZn MW: 258.5046

Pricing and Availability

(S)-4-[2-HYDROXY-3-PHENOXYPROPYLAMINOETHOXY]PHENOXYACETIC ACID HYDROCHLORIDE

Catalog No.: AA009GMA

CAS No.:141269-99-0 MDL No.: MFCD00673960

MF: C19H23NO6 MW: 361.3890

Pricing and Availability