Profile: Monomer-Polymer & Dajac Labs, Inc. offers specialty monomers & polymers, diagnostic reagents, fluorinated monomers, recative surfactants, novolac epoxy resins, oligomers, photoinitiators and synergists. Our monomer product line includes functional monomers, cross-linking agents, fire-retardant monomers, radiation-curable monomers, optically active monomers and reactive dilutents.
| • Allylics | ||||||||
| • Allylthiourea
IUPAC Name: prop-2-enylthiourea | CAS Registry Number: 109-57-9 Synonyms: Thiosinamine, N-Allylthiourea, ALLYLTHIOUREA, Thiosinamin, Rhodallin, Rhodalline, Aminosin, Allyl thiourea, 1-Allylthiourea, Thiocynamine, Thiosinaminum, Tiosinamin, Tiosinamine, Allylthiocarbamide, alylthiourea, 1-Allyl-2-thiourea, Thiourea, 2-propenyl-, Allylthiourea [INN], (2-Propenyl)thiourea, Aliltiourea [Spanish]
InChIKey: HTKFORQRBXIQHD-UHFFFAOYSA-N | ||||||||
| • Allyltrimethylsilane
IUPAC Name: trimethyl(prop-2-enyl)silane | CAS Registry Number: 762-72-1 Synonyms: Silane, allyltrimethyl-, Silane, trimethyl-2-propenyl-, allyl(trimethyl)silane, 3-(Trimethylsilyl)propene, ALLYL TRIMETHYLSILANE, CCRIS 2649, 208264_ALDRICH, EINECS 212-104-5, CID69808, LS-188195, TL8005210, InChI=1/C6H14Si/c1-5-6-7(2,3)4/h5H,1,6H2,2-4H
InChIKey: HYWCXWRMUZYRPH-UHFFFAOYSA-N | ||||||||
| • Alpha Methylstyrene
IUPAC Name: prop-1-en-2-ylbenzene | CAS Registry Number: 98-83-9 Synonyms: alpha-Methylstyrene, Isopropenylbenzene, 2-Phenylpropene, 2-Phenylpropylene, alpha-Methylstyrol, beta-Phenylpropene, beta-Phenylpropylene, 2-Phenyl-1-propene, as-Methylphenylethylene, a-methyl styrene, .alpha.-Methylstyrene, Benzene, (1-methylethenyl)-, Isopropenyl-benzol, 1-Methyl-1-phenylethylene, Isopropenil-benzolo, Isopropenyl-benzeen, 1-MethylethenylBenzine, 1-Phenyl-1-methylethylene, (1-Methylethenyl)benzene, 1-Propene, 2-phenyl-
InChIKey: XYLMUPLGERFSHI-UHFFFAOYSA-N | ||||||||
| • Alpha Olefin C14
IUPAC Name: tetradec-1-ene | CAS Registry Number: 1120-36-1 Synonyms: 1-TETRADECENE, n-Tetradec-1-ene, Tetradecane, 1-Tetradecylene, alpha-Tetradecene, Tetradec-1-ene, CCRIS 3785, T9805_ALDRICH, Alkenes, C14-18 alpha-, Alkenes, C14-20 alpha-, (C14-C18) alpha-Olefin, (C14-C20) alpha-Olefin, HSDB 1087, 442278_SUPELCO, Alkenes, C10-16 .alpha.-, 87187_FLUKA, 87189_FLUKA, EINECS 214-306-9, NSC 66434, NSC66434
InChIKey: HFDVRLIODXPAHB-UHFFFAOYSA-N | ||||||||
| • AMI5
IUPAC Name: disodium 2-(2,4,5,7-tetrabromo-3-oxido-6-oxoxanthen-9-yl)benzoate | CAS Registry Number: 17372-87-1 Synonyms: Eosin yellowish, Eosin, Eosine Yellowish, Bromoeosine, Eosine, Bromofluorescein, Eosine G, Sodium eosine, Eosin Y, Bromo acid, Bronze Bromo, Certiqual Eosine, Aizen eosine GH, Bromo Fluorescein, Eosine A, Eosine B, Eosine J, Eosine Y, Eosine w/s, Sodium eosinate
InChIKey: SEACYXSIPDVVMV-UHFFFAOYSA-L | ||||||||
| • Amidinothiourea
IUPAC Name: diaminomethylidenethiourea | CAS Registry Number: 2114-02-5 Synonyms: Guthimin, Guthimine, Gutimine, N-Amidinothiourea, 1-Amidinothiourea, GUANYLTHIOUREA, Thiodicyanodiamidine, 1-Amidino-2-thiourea, carbamimidoyl-thiourea, 2-Imino-4-thiobiuret, Urea, 1-guanyl-2-thio-, Thiourea, (aminoiminomethyl)-, Urea, 1-amidino-2-thio-, 334677_ALDRICH, EINECS 218-308-0, NSC 55743, BB_SC-1723, NSC55743, AI3-62541, LS-158821
InChIKey: OKGXJRGLYVRVNE-UHFFFAOYSA-N | ||||||||
| • Amino Methyl Crotonate | ||||||||
| • Ammonium Persulphate
IUPAC Name: diazanium sulfonatooxy sulfate | CAS Registry Number: 7727-54-0 Synonyms: Ammonium persulfate, Diammonium persulfate, Ammonium peroxydisulfate, Diammonium peroxydisulfate, Diammonium peroxodisulphate, Diammonium peroxydisulphate, CCRIS 1430, Persulfate d'ammonium [French], EINECS 231-786-5, UN1444, PEROXYDISULFURIC ACID, DIAMMONIUM SALT, LS-2430, Ammonium persulfate [UN1444] [Oxidizer], Ammonium persulfate [UN1444] [Oxidizer], diammonium [(sulfonatoperoxy)sulfonyl]oxidanide, Peroxydisulfuric acid (((HO)S(O)2)2O2), diammonium salt, 398469-95-9
InChIKey: ROOXNKNUYICQNP-UHFFFAOYSA-N | ||||||||
| • Amphoteric Surface Active Agents | ||||||||
| • Analytical Reagents | ||||||||
| • Art Conservation Polymers | ||||||||
| • Basic Fuchsin, Certified
IUPAC Name: 4-[(4-aminophenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]aniline;hydrochloride | CAS Registry Number: 58969-01-0 Synonyms: Basic violet 14, Rosaniline, Fuchsin, Basic magenta, Fuchsin basic, Fuchsine, Rosaniline hydrochloride, Rose aniline, Fuchsin, basic, MAGENTA, Magenta I, C.I. Basic Violet 14, Rosaniline chloride, Rosanilinium chloride, Aizen magenta, Basic fuchsine, Methyl fuchsin, Diamond Fuchsin, Aniline red, Mitsui Magenta
InChIKey: AXDJCCTWPBKUKL-UHFFFAOYSA-N | ||||||||
| • Benzoate Plasticizers | ||||||||
| • Benzocaine
IUPAC Name: ethyl 4-aminobenzoate | CAS Registry Number: 94-09-7 Synonyms: benzocaine, Parathesin, Anaesthesin, Anesthesine, Parathesine, Americaine, Anaesthin, Anestezin, Anesthesin, Anesthone, Dermoplast, Hurricaine, Identhesin, Solarcaine, Ethoform, Keloform, Norcaine, Orthesin, Topcaine, Norcain
InChIKey: BLFLLBZGZJTVJG-UHFFFAOYSA-N | ||||||||
| • Benzoguanamine
IUPAC Name: 6-phenyl-1,3,5-triazine-2,4-diamine | CAS Registry Number: 91-76-9 Synonyms: Benzoguanimine, Benzoguanamine (VAN), USAF RH-5, s-Triazine, 2,4-diamino-6-phenyl-, 2,4-Diamino-6-phenyl-s-triazine, 2-Phenyl-4,6-diamino-s-triazine, 4,6-Diamino-2-phenyl-s-triazine, D23408_ALDRICH, 6-Phenyl-1,3,5-triazine-2,4-diamine, HSDB 5275, MLS000079044, MLS002207438, 1,3,5-Triazine-2,4-diamine, 6-phenyl-, ENT 60118, CCRIS 9098, NSC 3267, STOCK1S-00285, EINECS 202-095-6, CID7064, NSC3267
InChIKey: GZVHEAJQGPRDLQ-UHFFFAOYSA-N | ||||||||
| • Benzophenones
IUPAC Name: di(phenyl)methanone | CAS Registry Number: 119-61-9 Synonyms: BENZOPHENONE, Diphenyl ketone, diphenylmethanone, Benzoylbenzene, Phenyl ketone, Methanone, diphenyl-, alpha-Oxoditane, Ketone, diphenyl, Diphenylketone, Benzene, benzoyl-, 1dzp, alpha-Oxodiphenylmethane, .alpha.-Oxoditane, di(phenyl)methanone, Caswell No. 081G, WLN: RVR, .alpha.-Oxodiphenylmethane, CCRIS 629, UPCMLD-DP071, BENZOPHENONE (8CI)
InChIKey: RWCCWEUUXYIKHB-UHFFFAOYSA-N | ||||||||
| • Benzoyl Peroxide
IUPAC Name: benzoyl benzenecarboperoxoate | CAS Registry Number: 94-36-0 Synonyms: BENZOYL PEROXIDE, Panoxyl, Peroxide, dibenzoyl, Benzoperoxide, Theraderm, Acetoxyl, Asidopan, Dibenzoyl peroxide, Persadox, Benoxyl, Lucidol, Mytolac, Oxylite, Benzac, Eloxyl, Benzol peroxide, Benzoyl superoxide, Resdan Akne, Epi-Clear, Persa-Gel
InChIKey: OMPJBNCRMGITSC-UHFFFAOYSA-N | ||||||||
| • Benzyl Methacrylate
IUPAC Name: phenylmethyl 2-methylprop-2-enoate | CAS Registry Number: 2495-37-6 Synonyms: BENZYL METHACRYLATE, Benzyl 2-methylacrylate, Poly(benzylmethacrylate), Methacrylic acid, benzyl ester, Poly(benzyl methacrylate), Methacrylic acid benzyl ester, 181358_ALDRICH, 409448_ALDRICH, phenylmethyl 2-methylprop-2-enoate, EINECS 219-674-4, NSC 20970, NSC20970, ZINC01577283, 2-Propenoic acid, 2-methyl-, phenylmethyl ester, LS-184927, 25085-83-0, 2696-41-5
InChIKey: AOJOEFVRHOZDFN-UHFFFAOYSA-N | ||||||||
| • beta-Propiolactone
IUPAC Name: oxetan-2-one | CAS Registry Number: 57-57-8 Synonyms: Propiolactone, 2-Oxetanone, beta-propiolactone, Propanolide, Betaprone, 3-Propanolide, 3-Propiolactone, Oxetan-2-one, 1,3-Propiolactone, Propionolactone, Oxetanone, .beta.-Propiolactone, beta-Propionolactone, b-Propiolactone, beta-Proprolactone, beta-Propiolakton, Propiolactone, beta-, Betaprone (TN), beta3-Propiolactone, Caswell No. 709
InChIKey: VEZXCJBBBCKRPI-UHFFFAOYSA-N | ||||||||
| • Biochemical Intermediates | ||||||||
| • Biochemical Reagents | ||||||||
| • Bisoctrizole
IUPAC Name: 2-(benzotriazol-2-yl)-6-[[3-(benzotriazol-2-yl)-2-hydroxy-5-(2,4,4-trimethylpentan-2-yl)phenyl]methyl]-4-(2,4,4-trimethylpentan-2-yl)phenol | CAS Registry Number: 103597-45-1 Synonyms: Tinosorb M, MBBT, Bisoctrizole [USAN], Bisoctrizole (USAN), Bisoctrizole (USAN/INN), 407941_ALDRICH, FAT 75'634, CID3571576, NCGC00167544-01, LS-181590, D03249, 2,2'-Methylenebis(6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol), Phenol, 2,2'-methylenebis(6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)-, 2,2'-Methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol], Phenol, 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)-
InChIKey: FQUNFJULCYSSOP-UHFFFAOYSA-N | ||||||||
| • Bisphenol-A-Dimethacrylate
IUPAC Name: [4-[2-[4-(2-methylprop-2-enoyloxy)phenyl]propan-2-yl]phenyl] 2-methylprop-2-enoate | CAS Registry Number: 3253-39-2 Synonyms: Bisphenol A dimethacrylate, Bis-DMA, 2,2-di(4-Methacryloxyphenyl)propane, 156329_ALDRICH, EINECS 221-846-9, C23H24O4, CID76739, ZINC02166863, 4,4'-Isopropylidenediphenol dimethacrylate, 4,4'-Isopropylidenediphenyl dimethacrylate, LS-174382, ST5308625, C14345, 2-Propenoic acid, 2-methyl-, (1-methylethylidene)di-4,1-phenylene ester
InChIKey: QUZSUMLPWDHKCJ-UHFFFAOYSA-N | ||||||||
| • Bromine Fine Chemicals | ||||||||
| • Bromostyrene
IUPAC Name: [(Z)-2-bromoethenyl]benzene | CAS Registry Number: 1335-06-4 Synonyms: BETA-BROMOSTYRENE, Benzene, bromoethenyl-, 1-Bromo-2-phenylethene, [(Z)-2-Bromoethenyl]benzene, EINECS 215-617-2, NSC147118, NSC147120, Benzene, (2-bromoethenyl)-, (Z)-, 41380-64-7, 588-72-7, 588-73-8
InChIKey: YMOONIIMQBGTDU-SREVYHEPSA-N | ||||||||
| • Butadiene Polymers
IUPAC Name: (E)-but-2-ene | CAS Registry Number: 9003-17-2 Synonyms: Pseudobutylene, beta-Butylene, trans-2-Butene, Dimethylethylene, Butylene-2, trans-Butene, Butene-2, Alfine, Hystl, Butadiene resin, 2-trans-Butene, beta-Butene, 2-BUTENE, Butadiene polymer, beta-trans-Butylene, 2-Butene-trans, Butadiene oligomer, .beta.-Butene, trans-but-2-ene, (E)-2-Butene
InChIKey: IAQRGUVFOMOMEM-ONEGZZNKSA-N | ||||||||
| • Butyl Acrylate
IUPAC Name: butyl prop-2-enoate | CAS Registry Number: 141-32-2 Synonyms: n-Butyl acrylate, BUTYL ACRYLATE, n-Butyl propenoate, Butyl 2-propenoate, Acrylic acid butyl ester, 2-Propenoic acid, butyl ester, Acrylic acid, butyl ester, butyl prop-2-enoate, Poly(butyl acrylate), Acrylic acid n-butyl ester, Polymerized butyl acrylate, CCRIS 3401, HSDB 305, Acrylic acid, n-butyl ester, Poly(butyl acrylate) solution, WLN: 4OV1U1, 181404_ALDRICH, 181412_ALDRICH, 234923_ALDRICH, CHEBI:3245
InChIKey: CQEYYJKEWSMYFG-UHFFFAOYSA-N | ||||||||
| • Butyl Glycidyl Ether
IUPAC Name: 2-(butoxymethyl)oxirane | CAS Registry Number: 2426-08-6 Synonyms: n-Butyl glycidyl ether, Ageflex BGE, Sipomer BGE, Oxirane, (butoxymethyl)-, (Butoxymethyl)oxirane, Ether, butyl glycidyl, Glycidyl butyl ether, Glycidylbutyl ether, Araldite RD-1, BUTYL GLYCIDYL ETHER, 1-Butoxy-2,3-epoxypropane, 3-Butoxy-1,2-epoxypropane, Butyl glycidyl ether, n-, Propane, 1-butoxy-2,3-epoxy-, 2,3-Epoxypropyl butyl ether, 2-(Butoxymethyl)oxirane, Ether, butyl 2,3-epoxypropyl, Butyl 2,3-epoxypropyl ether, CCRIS 828, Butyl 2,3-epoxy propyl ether
InChIKey: YSUQLAYJZDEMOT-UHFFFAOYSA-N | ||||||||
| • Butyl Methacrylate
IUPAC Name: butyl 2-methylprop-2-enoate | CAS Registry Number: 97-88-1 Synonyms: Butylmethacrylate, N-Butyl methacrylate, BUTYL METHACRYLATE, Butylmethacrylaat, Butyl 2-methacrylate, Butil metacrilato, 2-Methyl-butylacrylate, Polybutyl methacrylate, Poly(butyl methacrylate), Methacrylic acid, butyl ester, 2-Methyl-butylacrylat, Methacrylate de butyle, 2-Methyl-butylacrylaat, Butyl 2-methylacrylate, Butyl methacrylate monomer, Butylmethacrylaat [Dutch], Methacrylsaeurebutylester, Butyl 2-methyl-2-propenoate, Poly(n-butyl methacrylate), Butil metacrilato [Italian]
InChIKey: SOGAXMICEFXMKE-UHFFFAOYSA-N | ||||||||
| • Butyl Methacrylic Acid | ||||||||
| • C.I. Orange G
IUPAC Name: sodium 7-oxo-8-(phenylhydrazinylidene)naphthalene-1,3-disulfonic acid | CAS Registry Number: 1936-15-8 Synonyms: Orange G, Acid orange 10, Light Orange G, Orange G dye, Orange GG, Acid Orange G, Colacid Orange G, Dolkwal Orange G, Fast Orange G, Hexacol Orange G, Wool Orange G, Acid Orange GG, Food Orange GG, Orange BPC, Orange GMP, Acilan Orange GX, Egacid Orange GG, Ink Orange JSN, Straight Orange G, Acid Orange 2G
InChIKey: WKVQHOYGERXKGQ-UHFFFAOYSA-N | ||||||||
| • Caffeine
IUPAC Name: 1,3,7-trimethylpurine-2,6-dione | CAS Registry Number: 58-08-2 Synonyms: caffeine, Cafeina, Guaranine, Caffein, Koffein, Mateina, Methyltheobromine, Alert-pep, Thein, Cafipel, Theine, Caffedrine, Coffeine, Dexitac, Refresh'n, Stim, Methyltheobromide, Cafamil, Cafecon, Caffine
InChIKey: RYYVLZVUVIJVGH-UHFFFAOYSA-N | ||||||||
| • Caprolactam
IUPAC Name: azepan-2-one | CAS Registry Number: 105-60-2 Synonyms: epsilon-Caprolactam, 6-Caprolactam, Hexanolactam, 6-Hexanelactam, Aminocaproic lactam, Hexanone isoxime, CAPROLACTAM, hexannic acid, 2-Oxohexamethylenimine, 2-Azacycloheptanone, 2-Perhydroazepinone, azepan-2-one, Kapromine, Stilon, 1,6-Hexolactam, E-caprolactum, Hexahydro-2-azepinone, Caprolactam monomer, gamma-caprolactam, omega-caprolactum
InChIKey: JBKVHLHDHHXQEQ-UHFFFAOYSA-N | ||||||||
| • Carboxylated Styrene
IUPAC Name: buta-1,3-diene; ethenylbenzene | CAS Registry Number: 9003-55-8 Synonyms: Plioflex, Duranit, Andrez, SBS copolymer, Vestyron HI, Dienol S, Pliolite S5, Litex CA, Histyrene S 6F, Pliolite 55B, Pliolite S 5A, Pliolite S 5D, Pliolite S-5B, Pliolite S-5C, Pliolite S-5E, Duranit 40, Thermoplastic 125, Pliolite 151, Pliolite 160, Pliolite 491
InChIKey: MTAZNLWOLGHBHU-UHFFFAOYSA-N | ||||||||
| • Catalysts, Polymerization | ||||||||
| • Catalysts, Vinyl | ||||||||
| • Cationic Acrylate Monomer | ||||||||
| • Cationic Methacrylate Monomer | ||||||||
| • Cationic Urea Formaldehyde Resins | ||||||||
| • Cellactose | ||||||||
| • Chlorinated Polyethylene
IUPAC Name: chloroethene;ethene | CAS Registry Number: 63231-66-3 Synonyms: vinyl chloride-ethylene, Polyethylene, chlorinated, MFCD00084424, 103403-EP2270101A1, 103403-EP2301924A1
InChIKey: KRGNPJFAKZHQPS-UHFFFAOYSA-N | ||||||||
| • Chlorinated Polypropylene
IUPAC Name: 1-chloro-2-methylprop-1-ene;2-methylprop-1-ene | CAS Registry Number: 68442-33-1
InChIKey: XTGNKSJOZYQFCJ-UHFFFAOYSA-N | ||||||||
| • Chlorinated Polyvinyl Chloride (CAS: 68648-82-8) | ||||||||
| • Chloromethylated Polystyrene
IUPAC Name: 2-heptan-3-yl-5-methyl-5-nitro-1,3-dioxane | CAS Registry Number: 70024-51-0 Synonyms: 2-(heptan-3-yl)-5-methyl-5-nitro-1,3-dioxane, 17144-55-7, NSC70024, AC1L5HUX, AC1Q1WSE, CTK4D3942, AR-1C9309, NSC-70024, AG-J-32507, 2-heptan-3-yl-5-methyl-5-nitro-1,3-dioxane, 1,3-Dioxane,2-(1-ethylpentyl)-5-methyl-5-nitro-, m-Dioxane,2-(1-ethylpentyl)-5-methyl-5-nitro- (8CI); NSC 70024
InChIKey: FCGHBWUKOGKLKO-UHFFFAOYSA-N | ||||||||
| • Cinnamoyl Chloride
IUPAC Name: (E)-3-phenylprop-2-enoyl chloride | CAS Registry Number: 102-92-1 Synonyms: Cinnamoyl chloride, Cinnamoylchloride, Cinnamic chloride, Cinnamic acid chloride, 2-Propenoyl chloride, 3-phenyl-, beta-Phenylacryloyl chloride, 3-Phenyl-2-propenoyl chloride, C81101_ALDRICH, .beta.-Phenylacryloyl chloride, trans-3-Phenylacryloyl chloride, NSC4683, (2E)-3-Phenyl-2-propenoyl chloride, NSC 4683, EINECS 203-065-5, ZINC01680031, CID5354261, 2-Propenoyl chloride, 3-phenyl-, (E)-, ST5214048
InChIKey: WOGITNXCNOTRLK-VOTSOKGWSA-N | ||||||||
| • Cis-Octene-2
IUPAC Name: (Z)-oct-2-ene | CAS Registry Number: 7642-04-8 Synonyms: trans-2-Octene, (Z)-2-Octene, E-2-Octene, 2-Octene, (Z)-, (E)-2-Octene, (Z)-Oct-2-ene, 2-OCTENE, OCTENE-2, 2-Octene, (E)-, 2-OCTENE (CIS), NSC66572, NSC97522, 2-Octene(mixed cis, trans isomers), EINECS 231-577-9, 111-67-1, 13389-42-9
InChIKey: ILPBINAXDRFYPL-HYXAFXHYSA-N | ||||||||
| • cis-Pentene-2
IUPAC Name: (Z)-pent-2-ene | CAS Registry Number: 627-20-3 Synonyms: cis-2-PENTENE, cis-Pentene, beta-Amylene-cis, cis-beta-Amylene, (Z)-2-Pentene, Methylethylethylene, 3-Pentene, .beta.-n-Amylene, 2-Pentene, (Z)-, cis-beta-N-Amylene, sym-Methylethylethylene, (Z)-Pent-2-ene, 2-PENTENE, 2-Pentene, (2Z)-, Hydrocarbons, C5-unsatd., 143766_ALDRICH, 76979_FLUKA, HSDB 5725, NSC7894, EINECS 210-988-7
InChIKey: QMMOXUPEWRXHJS-HYXAFXHYSA-N | ||||||||
| • Citraconic acid anhydride
IUPAC Name: 3-methylfuran-2,5-dione | CAS Registry Number: 616-02-4 Synonyms: Citraconic anhydride, 2,5-Furandione, 3-methyl-, 2-Methylmaleic anhydride, 3-Methylmaleic anhydride, Monomethylmaleic anhydride, Maleic anhydride, methyl-, METHYLMALEIC ANHYDRIDE, 3-methylfuran-2,5-dione, 3-Methyl-2,5-furandione, WLN: T5VOVJ D1, HSDB 5716, .alpha.-Methylmaleic anhydride, NSC6182, 125318_ALDRICH, NSC 6182, 27430_FLUKA, EINECS 210-459-0, Anhydrid kyseliny citrakonove [Czech], CID12012, BRN 0001835
InChIKey: AYKYXWQEBUNJCN-UHFFFAOYSA-N | ||||||||
| • Colloids, Protective |