Product Index

1,4-DIHYDRO-2,6-DIMETHYL-5-ETHOXYCARBONYL-4-(2,3-DICHLOROPHENYL)-3-PYRIDINECARBOXYLIC ACID

Catalog No.: AA00ADCE

CAS No.:150131-21-8 MDL No.: MFCD09753525

MF: C17H17Cl2NO4 MW: 370.2272

Pricing and Availability

1,1-Bis((2S,5S)-2,5-dimethylphospholano)ferrocene

Catalog No.: AA00ADYP

CAS No.:162412-87-5 MDL No.: MFCD09265089

MF: C22H32FeP2 MW: 414.2820

Pricing and Availability

1-[4-(2-Phenyleth-1-ynyl)phenyl]ethan-1-one

Catalog No.: AA00ALTZ

CAS No.:1942-31-0 MDL No.: MFCD00219774

MF: C16H12O MW: 220.2659

Pricing and Availability

1H-1,2,3-Triazole, 5-nitro-

Catalog No.: AA00ANU3

CAS No.:14544-45-7 MDL No.: MFCD11502061

MF: C2H2N4O2 MW: 114.0629

Pricing and Availability

1-BroMo-5-Methoxy-2,4-dinitro-benzene

Catalog No.: AA00ANUW

CAS No.:181995-71-1 MDL No.: MFCD00624873

MF: C7H5BrN2O5 MW: 277.0290

Pricing and Availability

1-Chloro-4-cyclopropoxybenzene

Catalog No.: AA00ANVB

CAS No.:17204-68-1 MDL No.: MFCD17000492

MF: C9H9ClO MW: 168.6202

Pricing and Availability

1-(5-Bromo-4-chloro-2-fluoro-phenyl)-ethanone

Catalog No.: AA00ANVK

CAS No.:1704367-12-3 MDL No.: MFCD27918594

MF: C8H5BrClFO MW: 251.4801

Pricing and Availability

1 2-DIMETHYL-3-PROPYLIMIDAZOLIUMTRIS(TRI

Catalog No.: AA00APV2

CAS No.:169051-77-8 MDL No.: MFCD03788923

MF: C12H15F9N2O6S3 MW: 550.4379

Pricing and Availability

1-Bromo-4-((2-methoxyethoxy)methyl)benzene

Catalog No.: AA00ARGP

CAS No.:166959-29-1 MDL No.: MFCD14687001

MF: C10H13BrO2 MW: 245.1130

Pricing and Availability

1,3,4,6,7,9,9b-heptaazaphenalene-2,5,8-triamine

Catalog No.: AA00ASAW

CAS No.:1502-47-2 MDL No.: MFCD00767872

MF: C6H6N10 MW: 218.1788

Pricing and Availability

1-(3,3-Dimethylbutyl)-3-(2-fluoro-4-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)urea

Catalog No.: AA00ASEX

CAS No.:1454682-74-6 MDL No.: MFCD30183445

MF: C20H32BFN2O3 MW: 378.2891

Pricing and Availability

1-Amino-n,n-dimethylcyclobutane-1-carboxamide

Catalog No.: AA00ASW1

CAS No.:1508823-36-6 MDL No.: MFCD24059179

MF: C7H14N2O MW: 142.1989

Pricing and Availability

1-Amino-n,n-dimethylcyclopropane-1-carboxamide

Catalog No.: AA00ASW2

CAS No.:1481463-48-2 MDL No.: MFCD21238101

MF: C6H12N2O MW: 128.1723

Pricing and Availability

1-(2-Fluoro-4-hydroxy-5-nitro-phenyl)-ethanone

Catalog No.: AA00ASXW

CAS No.:1613720-24-3 MDL No.: MFCD30180180

MF: C8H6FNO4 MW: 199.1359

Pricing and Availability

1-(5-Amino-2-fluoro-4-hydroxyphenyl)ethan-1-one

Catalog No.: AA00ASXZ

CAS No.:1613720-25-4 MDL No.: MFCD30180181

MF: MW:

Pricing and Availability

1H-Indazole-3,5-diamine hydrochloride

Catalog No.: AA00ASZJ

CAS No.:19335-15-0 MDL No.: MFCD30478184

MF: C7H9ClN4 MW: 184.6262

Pricing and Availability

1,5-Dimethyl-1H-pyrrole-2-carboxamide

Catalog No.: AA00B2RC

CAS No.:174151-06-5 MDL No.: MFCD12923555

MF: C7H10N2O MW: 138.1671

Pricing and Availability

1-(2-hydroxyphenyl)pentan-1-one

Catalog No.: AA00B6EI

CAS No.:18430-91-6 MDL No.: MFCD07787571

MF: C11H14O2 MW: 178.2277

Pricing and Availability

1-tert-Butyl 3-methyl 4-oxopyrrolidine-1,3-dicarboxylate

Catalog No.: AA00BBBL

CAS No.:194924-95-3 MDL No.: MFCD11052377

MF: C11H17NO5 MW: 243.2564

Pricing and Availability

1-([1,1'-Biphenyl]-2-yl)ethanone

Catalog No.: AA00BBJT

CAS No.:2142-66-7 MDL No.: MFCD00053707

MF: C14H12O MW: 196.2445

Pricing and Availability

1,2,3-Trimethyl-isothiourea

Catalog No.: AA00BBN7

CAS No.:2986-23-4 MDL No.: MFCD08274897

MF: C4H10N2S MW: 118.2006

Pricing and Availability

1,8-DICHLORONAPHTHALENE

Catalog No.: AA00BD9D

CAS No.:2050-74-0 MDL No.: MFCD03701748

MF: C10H6Cl2 MW: 197.0606

Pricing and Availability

1,5-Naphthyridin-4-amine

Catalog No.: AA00BDD9

CAS No.:27392-68-3 MDL No.: MFCD00234410

MF: C8H7N3 MW: 145.1613

Pricing and Availability

1-Iodo-3-methoxy-2-methylbenzene

Catalog No.: AA00BF7M

CAS No.:21093-09-4 MDL No.: MFCD01833807

MF: C8H9IO MW: 248.0609

Pricing and Availability

1',3'-Dihydrospiro[imidazolidine-4,2'-indene]-2,5-dione

Catalog No.: AA00BF9L

CAS No.:27473-61-6 MDL No.: MFCD01683900

MF: C11H10N2O2 MW: 202.2093

Pricing and Availability

1-(1H-imidazol-4-yl)propan-1-one

Catalog No.: AA00BH88

CAS No.:304457-86-1 MDL No.: MFCD19216577

MF: C6H8N2O MW: 124.1405

Pricing and Availability

1-(2-Hydroxy-4-trifluoromethyl-phenyl)-ethanone

Catalog No.: AA00BHML

CAS No.:228572-69-8 MDL No.: MFCD09754177

MF: C9H7F3O2 MW: 204.1459

Pricing and Availability

1-Methoxymethoxy-3-nitro-benzene

Catalog No.: AA00BHZ8

CAS No.:25458-48-4 MDL No.: MFCD27918631

MF: C8H9NO4 MW: 183.1614

Pricing and Availability

1-(tert-Butyl)-2-methoxybenzene

Catalog No.: AA00BHZ9

CAS No.:2944-48-1 MDL No.: MFCD15527518

MF: C11H16O MW: 164.2441

Pricing and Availability

1-(4-Amino-3-chloro-phenyl)-acetic acid

Catalog No.: AA00BJP5

CAS No.:22106-57-6 MDL No.: MFCD11975979

MF: C8H8ClNO2 MW: 185.6076

Pricing and Availability

1H-Pyrazolo[3,4-c]pyridin-3-aMine,5-chloro-

Catalog No.: AA00BJPU

CAS No.:245325-32-0 MDL No.: MFCD13177857

MF: C6H5ClN4 MW: 168.5837

Pricing and Availability

1-Fluoro-2-iodo-5-methyl-4-nitrobenzene

Catalog No.: AA00BJPY

CAS No.:259860-34-9 MDL No.: MFCD15527687

MF: C7H5FINO2 MW: 281.0230

Pricing and Availability

17-ALPHA-HYDROXY-16-BETA-METHYL-3,20-DIOXOPREGNA-1,4-DIEN-21-YL ACETATE

Catalog No.: AA00BKJP

CAS No.:24510-55-2 MDL No.:

MF: MW:

Pricing and Availability

1-(2-Amino-5-methylphenyl)ethanone

Catalog No.: AA00BPW3

CAS No.:25428-06-2 MDL No.: MFCD13193690

MF: C9H11NO MW: 149.1897

Pricing and Availability

1(2H)-Azocinesulfonamide,hexahydro-(8CI)

Catalog No.: AA00BSPG

CAS No.:29609-21-0 MDL No.: MFCD11205209

MF: C7H16N2O2S MW: 192.2791

Pricing and Availability

1H-Imidazo[4,5-b]pyridine,1-ethyl-

Catalog No.: AA00BT59

CAS No.:273756-99-3 MDL No.: MFCD18808124

MF: C8H9N3 MW: 147.1772

Pricing and Availability

1-Benzyl-3,4-dihydroxypyrrolidine-2,5-dione

Catalog No.: AA00BY40

CAS No.:332040-86-5 MDL No.: MFCD00453797

MF: C11H11NO4 MW: 221.2093

Pricing and Availability

1-LIGNOCEROYL-2-HYDROXY-SN-GLYCERO-3-PHOSPHOCHOLINE

Catalog No.: AA00BYZK

CAS No.:325171-59-3 MDL No.: MFCD00674360

MF: C32H66NO7P MW: 607.8427

Pricing and Availability

1,2-BIS(DICHLOROPHOSPHINO)-1,2-DIMETHYLHYDRAZINE

Catalog No.: AA00C07R

CAS No.:37170-64-2 MDL No.: MFCD00269830

MF: C2H6Cl4N2P2 MW: 261.8420

Pricing and Availability

10-(2-(1-Methylpiperidin-2-yl)ethyl)-2-(methylsulfinyl)-10H-phenothiazine benzenesulfonate

Catalog No.: AA00C0HR

CAS No.:32672-69-8 MDL No.: MFCD00800983

MF: C27H32N2O4S3 MW: 544.7490

Pricing and Availability

1H-Heptafluoro-3,3-bis(trifluoromethyl)-1-hexyne

Catalog No.: AA00C13Y

CAS No.:261503-44-0 MDL No.: MFCD00155807

MF: C8HF13 MW: 344.0728

Pricing and Availability

1,1Bis((2S,5S)-2,5-diethylphospholano)ferrocene(cyclooctadiene)rhodium(I) tetrafluoroborate

Catalog No.: AA00C1QE

CAS No.:290347-88-5 MDL No.: MFCD17018833

MF: C34H40FeP2Rh+ MW: 669.3794

Pricing and Availability

1,2-Bis((2S,5S)-2,5-di-i-propylphospholano)ethane(cyclooctadiene)rhodium(I) tetrafluoroborate

Catalog No.: AA00C20H

CAS No.:213343-67-0 MDL No.: MFCD17018835

MF: C30H56BF4P2Rh- MW: 668.4233

Pricing and Availability

1-BenzylideneaMinohydantoin

Catalog No.: AA00C2P5

CAS No.:2827-57-8 MDL No.: MFCD01860080

MF: C10H9N3O2 MW: 203.1974

Pricing and Availability

1H-Cyclopentapyrimidine-1-acetic acid, 2-[[(4-fluorophenyl)methyl]thio]-4,5,6,7-tetrahydro-4-oxo-

Catalog No.: AA00C69F

CAS No.:356058-42-9 MDL No.: MFCD21337366

MF: C16H21FN2O3S MW: 340.4129

Pricing and Availability

1-(2-Methylaminopropyl)-2-phenyladamantane hydrochloride

Catalog No.: AA00C701

CAS No.:31897-80-0 MDL No.: MFCD01674041

MF: C20H30ClN MW: 319.9119

Pricing and Availability

1-(2-bromoprop-2-en-1-yl)piperidine

Catalog No.: AA00C7IB

CAS No.:37828-88-9 MDL No.: MFCD00698173

MF: C8H14BrN MW: 204.1075

Pricing and Availability

1-Butyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide

Catalog No.: AA00C8DK

CAS No.:344790-86-9 MDL No.: MFCD03788916

MF: C12H16F6N2O4S2 MW: 430.3869

Pricing and Availability

1,5-Bis(diphenylphosphino)octane

Catalog No.: AA00C8VY

CAS No.:41625-30-3 MDL No.: MFCD09834841

MF: C32H36P2 MW: 482.5758

Pricing and Availability

1-(2-bromoethyl)-4-ethylbenzene

Catalog No.: AA00CGUY

CAS No.:259818-85-4 MDL No.: MFCD11110081

MF: C10H13Br MW: 213.1142

Pricing and Availability

1-(3,5-Dimethylisoxazol-4-yl)ethanone

Catalog No.: AA00CIQM

CAS No.:35166-20-2 MDL No.: MFCD08701356

MF: C7H9NO2 MW: 139.1519

Pricing and Availability

1-(2-Amino-5-hydroxyphenyl)propan-1-one

Catalog No.: AA00CKJK

CAS No.:35364-15-9 MDL No.: MFCD16877176

MF: C9H11NO2 MW: 165.1891

Pricing and Availability

1-(Benzo[d][1,3]dioxol-5-yl)cyclopropanecarbonitrile

Catalog No.: AA00CKP5

CAS No.:33522-14-4 MDL No.: MFCD10692862

MF: C11H9NO2 MW: 187.1947

Pricing and Availability

1-Bromo-2-cyclopropoxybenzene

Catalog No.: AA00CL95

CAS No.:38380-86-8 MDL No.: MFCD17000488

MF: C9H9BrO MW: 213.0712

Pricing and Availability

1-(4-Bromophenyl)-2-phenylethane-1,2-dione

Catalog No.: AA00CM7J

CAS No.:39229-12-4 MDL No.: MFCD00223484

MF: C14H9BrO2 MW: 289.1241

Pricing and Availability

1-(Pyridin-2-yl)-1h-indole

Catalog No.: AA00CN58

CAS No.:3419-91-8 MDL No.: MFCD00602898

MF: C13H10N2 MW: 194.2319

Pricing and Availability

1-(bromomethyl)-4-iodo-2-nitrobenzene

Catalog No.: AA00CN8O

CAS No.:375792-98-6 MDL No.: MFCD13178310

MF: C7H5BrINO2 MW: 341.9286

Pricing and Availability

1-(4-Bromo-phenyl)-cyclopropanecarboxylic acid tert-butyl ester

Catalog No.: AA00CN8S

CAS No.:345965-53-9 MDL No.: MFCD24943186

MF: C14H17BrO2 MW: 297.1876

Pricing and Availability

1-(6-Methoxy-1h-benzimidazol-2-yl)-ethanone

Catalog No.: AA00CN9S

CAS No.:41510-17-2 MDL No.: MFCD13176836

MF: C10H10N2O2 MW: 190.1986

Pricing and Availability

1-(5-Bromo-2-hydroxy-4-methoxyphenyl)-ethanone

Catalog No.: AA00CRAI

CAS No.:39503-61-2 MDL No.: MFCD00597545

MF: C9H9BrO3 MW: 245.0700

Pricing and Availability

1,1-Dimethyl-3-(2-nitrophenyl)urea

Catalog No.: AA00CVAB

CAS No.:36894-29-8 MDL No.: MFCD01034780

MF: C9H11N3O3 MW: 209.2019

Pricing and Availability

1,2-BIS(PHOSPHINO)ETHANE

Catalog No.: AA00D9N5

CAS No.:5518-62-7 MDL No.: MFCD00049195

MF: C2H8P2 MW: 94.0324

Pricing and Availability

1-(4-Chlorobenzyl)-1h-benzimidazole-2-carbaldehyde

Catalog No.: AA00DAMA

CAS No.:537010-34-7 MDL No.: MFCD03473821

MF: C15H11ClN2O MW: 270.7136

Pricing and Availability

1,1Bis((2R,5R)-2,5-dimethylphospholano)ferrocene

Catalog No.: AA00DCQN

CAS No.:540475-45-4 MDL No.: MFCD08705241

MF: C22H32FeP2 MW: 414.2820

Pricing and Availability

1,2-Bis(diethoxyphosphinyl)ethyne

Catalog No.: AA00DCT8

CAS No.:4851-53-0 MDL No.: MFCD00015663

MF: C10H20O6P2 MW: 298.2097

Pricing and Availability

1-DI-I-PROPYLPHOSPHINO-2-(N,N-DIMETHYLAMINO)-1H-INDENE

Catalog No.: AA00DD1P

CAS No.:540492-51-1 MDL No.: MFCD09264275

MF: C17H26NP MW: 275.3688

Pricing and Availability

1,2-Bis((2S,5S)-2,5-di-i-propylphospholano)ethane

Catalog No.: AA00DD3C

CAS No.:528854-34-4 MDL No.: MFCD08705244

MF: C22H44P2 MW: 370.5323

Pricing and Availability

1'-Benzylspiro[indoline-3,4'-piperidine]

Catalog No.: AA00DD54

CAS No.:474538-99-3 MDL No.: MFCD04108106

MF: C19H22N2 MW: 278.3914

Pricing and Availability

1-(4-Bromophenyl)-5-chloro-1-oxopentane

Catalog No.: AA00DEUP

CAS No.:54874-12-3 MDL No.: MFCD02260551

MF: C11H12BrClO MW: 275.5694

Pricing and Availability

1-Methylpentylamine

Catalog No.: AA00DFRP

CAS No.:5329-79-3 MDL No.: MFCD00014815

MF: C6H15N MW: 101.1900

Pricing and Availability

1-Benzylpiperidine-3,5-dione

Catalog No.: AA00DFXW

CAS No.:50866-56-3 MDL No.: MFCD08669419

MF: C12H13NO2 MW: 203.2371

Pricing and Availability

1-(3,4-DIMETHOXYPHENYL)CYCLOHEXANECARBOXYLIC ACID

Catalog No.: AA00DGRS

CAS No.:54802-31-2 MDL No.: MFCD08442779

MF: C15H20O4 MW: 264.3169

Pricing and Availability

1-(5-Aminopyridin-2-yl)ethanone

Catalog No.: AA00DHUJ

CAS No.:51460-32-3 MDL No.: MFCD10697714

MF: C7H8N2O MW: 136.1512

Pricing and Availability

1-Bromo-5-fluoro-4-methoxy-2-methylbenzene

Catalog No.: AA00DJ7G

CAS No.:550400-11-8 MDL No.: MFCD16658746

MF: C8H8BrFO MW: 219.0509

Pricing and Availability

1-(5-Hydroxy-2-pyrimidinyl)piperazine

Catalog No.: AA00DJIU

CAS No.:55745-85-2 MDL No.: MFCD09910300

MF: C8H12N4O MW: 180.2071

Pricing and Availability

1-(4-Methyl-2-nitro-phenyl)-propan-2-one

Catalog No.: AA00DK0O

CAS No.:481065-79-6 MDL No.: MFCD18287417

MF: C10H11NO3 MW: 193.1992

Pricing and Availability

1-Chloro-3-(propan-2-yloxy)benzene

Catalog No.: AA00DK1T

CAS No.:51241-42-0 MDL No.: MFCD20390264

MF: C9H11ClO MW: 170.6360

Pricing and Availability

1-Chloro-4-(propan-2-yloxy)benzene

Catalog No.: AA00DK1S

CAS No.:51241-43-1 MDL No.: MFCD00070779

MF: C9H11ClO MW: 170.6360

Pricing and Availability

1-Benzyl-3-phenylpiperidin-4-one

Catalog No.: AA00DL0V

CAS No.:446302-83-6 MDL No.: MFCD11111091

MF: C18H19NO MW: 265.3496

Pricing and Availability

1-(2-Chloro-6-methylpyridin-3-yl)ethanone

Catalog No.: AA00DLU9

CAS No.:49667-29-0 MDL No.: MFCD11847247

MF: C8H8ClNO MW: 169.6082

Pricing and Availability

1,2-Di-p-tolyldiazene

Catalog No.: AA00DP7N

CAS No.:501-60-0 MDL No.: MFCD00048089

MF: C14H14N2 MW: 210.2744

Pricing and Availability

1-(3,5-Dimethyl-4-nitro-1H-pyrazol-1-yl)ethanone

Catalog No.: AA00DXK8

CAS No.:489408-45-9 MDL No.: MFCD01834646

MF: C7H9N3O3 MW: 183.1647

Pricing and Availability

1-Cyclohexyl-2-ethylbenzene

Catalog No.: AA00DZQF

CAS No.:4501-37-5 MDL No.: MFCD29090724

MF: C14H20 MW: 188.3086

Pricing and Availability

1-Benzyl-1h-1,2,4-triazole

Catalog No.: AA00E9BM

CAS No.:6085-94-5 MDL No.: MFCD00227141

MF: C9H9N3 MW: 159.1879

Pricing and Availability

1-(3-Hydroxyphenyl)-2,5-dihydro-1h-pyrrole-2,5-dione

Catalog No.: AA00EA8E

CAS No.:63381-38-4 MDL No.: MFCD00461770

MF: C10H7NO3 MW: 189.1675

Pricing and Availability

1-Methyl-5-(trifluoromethyl)-1h-indazol-3-amine

Catalog No.: AA00EAET

CAS No.:5685-69-8 MDL No.: MFCD07777192

MF: C9H8F3N3 MW: 215.1751

Pricing and Availability

17-phenyl trinor Prostaglandin F2α-d4

Catalog No.: AA00EBIH

CAS No.:58976-50-4 MDL No.:

MF: C23H28D4O5 MW: 392.5218

Pricing and Availability

1-DIPHENYLPHOSPHINO-2-(N,N-DIMETHYLAMINO)-1H-INDENE

Catalog No.: AA00EE6A

CAS No.:628323-64-8 MDL No.: MFCD09264273

MF: C23H22NP MW: 343.4012

Pricing and Availability

1-Chloro-3-(4-(2-methoxyethyl)phenoxy)propan-2-ol

Catalog No.: AA00EEI7

CAS No.:56718-76-4 MDL No.: MFCD06654214

MF: C12H17ClO3 MW: 244.7146

Pricing and Availability

1-(2-Methoxy-5-nitrophenyl)ethanone

Catalog No.: AA00EGOE

CAS No.:61941-46-6 MDL No.: MFCD09263720

MF: C9H9NO4 MW: 195.1721

Pricing and Availability

1-(2-Methoxymethoxy-phenyl)-ethanone

Catalog No.: AA00EK8H

CAS No.:6515-18-0 MDL No.: MFCD20921560

MF: C10H12O3 MW: 180.2005

Pricing and Availability

1,3-Dibutylpyrimidine-2,4,6(1H,3H,5H)-trione

Catalog No.: AA00EK8M

CAS No.:5770-40-1 MDL No.: MFCD19441892

MF: C12H20N2O3 MW: 240.2988

Pricing and Availability

1-(4-chloro-2-nitrophenyl)propan-2-one

Catalog No.: AA00EK8P

CAS No.:6127-13-5 MDL No.: MFCD18287404

MF: C9H8ClNO3 MW: 213.6177

Pricing and Availability

1-[2-nitro-4-(trifluoromethyl)phenyl]propan-2-one

Catalog No.: AA00EK8Q

CAS No.:57330-58-2 MDL No.: MFCD02113149

MF: C10H8F3NO3 MW: 247.1706

Pricing and Availability

1-(2-Chloro-1h-indol-3-yl)-ethanone

Catalog No.: AA00EK96

CAS No.:65287-74-3 MDL No.: MFCD02956036

MF: C10H8ClNO MW: 193.6296

Pricing and Availability

1-(2,2-Dimethoxy-ethyl)-2-isocyano-benzene

Catalog No.: AA00EK9P

CAS No.:592479-02-2 MDL No.: MFCD28044152

MF: C11H13NO2 MW: 191.2264

Pricing and Availability

1-(cyclohexylmethyl)piperidin-4-one

Catalog No.: AA00ERVA

CAS No.:64306-76-9 MDL No.: MFCD09947739

MF: C12H21NO MW: 195.3012

Pricing and Availability

1H-2-Benzopyran-1,4(3h)-dione

Catalog No.: AA00EWA3

CAS No.:5693-27-6 MDL No.: MFCD18807182

MF: C9H6O3 MW: 162.1421

Pricing and Availability

1H-Indazole, 7-broMo-3-(trifluoroMethyl)-

Catalog No.: AA00F18Y

CAS No.:57631-12-6 MDL No.: MFCD16616665

MF: C8H4BrF3N2 MW: 265.0300

Pricing and Availability

1-(Trimethylsiloxy)-5-methoxy-3-oxapentane

Catalog No.: AA00F546

CAS No.:62199-57-9 MDL No.: MFCD30187930

MF: C8H20O3Si MW: 192.3281

Pricing and Availability