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Organo-Metalloid Compounds

Organo-metalloid compounds possess direct bonds between carbon atoms and metalloid atoms. Organo-metalloid compounds are available in a range of chemical compositions, quantities, purities, and reagent grades.
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1 – 15 of 37 results
1

4,4-Di-n-octyldithieno[3,2-b:2,3-d']silole 95.0+%, TCI America™
SDP

CAS: 1160106-12-6 Molecular Formula: C24H38S2Si Molecular Weight (g/mol): 418.773 MDL Number: MFCD26793507 InChI Key: AUESHXZKMJNIJC-UHFFFAOYSA-N Synonym: 4,4-Di-n-octyl-4H-silolo[3,2-b:4,5-b′C]dithiophene PubChem CID: 68197960 SMILES: CCCCCCCC[Si]1(C2=C(C3=C1C=CS3)SC=C2)CCCCCCCC

PubChem CID 68197960
CAS 1160106-12-6
Molecular Weight (g/mol) 418.773
MDL Number MFCD26793507
SMILES CCCCCCCC[Si]1(C2=C(C3=C1C=CS3)SC=C2)CCCCCCCC
Synonym 4,4-Di-n-octyl-4H-silolo[3,2-b:4,5-b′C]dithiophene
InChI Key AUESHXZKMJNIJC-UHFFFAOYSA-N
Molecular Formula C24H38S2Si
2

1-[2-(Trimethylsilyl)ethoxycarbonyloxy]benzotriazole 98.0+%, TCI America™
SDP

CAS: 113306-55-1 Molecular Formula: C12H17N3O3Si Molecular Weight (g/mol): 279.37 MDL Number: MFCD11846123 InChI Key: BJUJSLXVBATBSB-UHFFFAOYSA-N Synonym: Teoc-OBt PubChem CID: 13892319 IUPAC Name: 1H-1,2,3-benzotriazol-1-yl 2-(trimethylsilyl)ethyl carbonate SMILES: C[Si](C)(C)CCOC(=O)ON1N=NC2=CC=CC=C12

PubChem CID 13892319
CAS 113306-55-1
Molecular Weight (g/mol) 279.37
MDL Number MFCD11846123
SMILES C[Si](C)(C)CCOC(=O)ON1N=NC2=CC=CC=C12
Synonym Teoc-OBt
IUPAC Name 1H-1,2,3-benzotriazol-1-yl 2-(trimethylsilyl)ethyl carbonate
InChI Key BJUJSLXVBATBSB-UHFFFAOYSA-N
Molecular Formula C12H17N3O3Si
3
Promotions Available

Sigma Aldrich 1,1,2-Trimethylbenz[e]indole

MilliporeSigma Sigma Organics products encompass a wide range of quality reagents, solvents, catalysts, and building blocks for organic synthesis. From benchtop discovery to process development and scale-up, Sigma Organics solutions are built to meet the needs of synthetic chemists.

ENCOMPASS
CAS 41532-84-7
4

Medchemexpress LLC 1,4-dihydro-2,4,6-trimethyl-3,5-pyridinedicarboxylic acid, 3,5-diethyl ester | 632-93-9 | 99.5% | 267.32 g/mol | C14H21NO4 | 5 G
SDP

Diethyl 2,4,6-trimethyl-1,4-dihydropyridine-3,5-dicarboxylate is a research-grade small-molecule standard (CAS 632-93-9) used in biochemical and toxicology studies, including liver disease models. Supplied as a white to off-white powder, it is suitable for analytical assays and model development where high-purity pyridinedicarboxylate esters are required.

  • Chemical formula C14H21NO4; molecular weight 267.32 g/mol.
  • High purity (HPLC) 99.5%.
  • Low water content (KF) 0.02%.
  • Physical state: white to off-white powder.
  • Storage: powder stable -20°C (3 years) or 4°C (2 years); in solvent -80°C (6 months).
  • Common use: research models of cholestatic liver injury and related studies.

ENCOMPASS_PREFERRED
5

Selleck Chemical LLC BSTFA-TMCS S5443-25mg
SDP

BSTFA-TMCS is used as a derivatizing agent in chromatography It functions as a silylation reagent without additional solvents The combination of BSTFA and TMCS is the preferred reagent for trimethylsilylation of alcohols alkaloids amines biogenic amines carboxylic acids phenols and steroids

ENCOMPASS_PREFERRED
6

Medchemexpress LLC Mal-PEG3-NH2 | 2830214-77-0 | MFCD34184381 | 99.1% | 386.32 g·mol⁻¹ | C14H21F3N2O7 | 5 MG
SDP

Mal-PEG3-NH2 TFA is a linear heterobifunctional polyethylene glycol (PEG) crosslinker supplied as the trifluoroacetic acid salt. It contains a maleimide at one terminus and a primary amine at the other, enabling orthogonal conjugation to thiols and amines for bioconjugation applications such as PROTAC and ADC linker design.

  • Provides maleimide and amine reactive groups for orthogonal conjugation.
  • Acts as a non-cleavable PEG spacer suitable for PROTAC and ADC constructs.
  • High purity (~99.1%) and defined molecular weight (386.32 g·mol⁻¹).
  • Viscous liquid form that dissolves in common organic solvents for easy handling.
  • Long-term stability when stored under nitrogen at -80 °C in solvent; short-term stability at -20 °C.
  • Offered in small research pack sizes for laboratory synthesis and linker optimization.

ENCOMPASS_PREFERRED
7

Medchemexpress LLC 3-(2-iodoethoxy)prop-1-yne | 164118-56-3 | MFCD24459258 | 95.0% | 210.01 g·mol⁻1 | C5H7IO | 1 G
SDP

3-(2-iodoethoxy)prop-1-yne is an alkyne-containing crosslinker designed for copper-catalyzed azide-alkyne click chemistry and subsequent functionalization. The reagent's iodo group serves as a good leaving group for nucleophilic substitution, making it useful for bioconjugation and installation of linkers in chemical biology workflows. Store protected from light and follow solvent storage recommendations for long-term stability.

  • Alkyne functional group for copper-catalyzed click reactions.
  • Iodo substituent provides a reactive leaving group for nucleophilic substitution.
  • Suitable for bioconjugation and linker installation in synthesis workflows.
  • Storage: protect from light; solvent storage at -80°C (6 months) or -20°C (1 month) as applicable.
  • Molecular formula C5H7IO, molecular weight 210.01 g·mol⁻1.

ENCOMPASS_PREFERRED
8

Medchemexpress LLC BnO-PEG5-OH | 57671-28-0 | 98.6% | 328.40 g/mol | C17H28O6 | 10 G
SDP

BnO-PEG5-OH is a polyethylene glycol (PEG)-based PROTAC linker used to connect ligands in proteolysis targeting chimera (PROTAC) synthesis, providing spacer functionality and flexibility to aid target engagement and E3 ligase recruitment.

  • Polyethylene glycol spacer with five ethylene glycol units.
  • High purity suitable for research applications.
  • Liquid, colorless to light yellow, density ≈ 1.10 g/cm3.
  • Stable under recommended storage conditions for pure material and in solvent.
  • Available in common laboratory pack sizes, including 10 g.

ENCOMPASS_PREFERRED
9

Medchemexpress LLC SB290157 trifluoroacetate | 1140525-25-2 | MFCD04974198 | 99.8% | 526.51 g·mol⁻¹ | C24H29F3N4O6 | 1 ML
SDP

SB290157 trifluoroacetate is the trifluoroacetate salt of SB290157, a potent and selective antagonist of the complement component 3a receptor (C3aR). It is supplied as a ready-to-use 10 mM solution in DMSO (1 mL) for in vitro research applications investigating C3aR-mediated signaling pathways.

  • Potent C3a receptor antagonist (IC50 200 nM).
  • Supplied as a 10 mM solution in DMSO, 1 mL.
  • High purity (~99.8%) suitable for biochemical assays.
  • Molecular weight 526.51 g·mol⁻¹ for the trifluoroacetate salt.
  • Formulated as a trifluoroacetate salt to aid solubility in organic solvents.

ENCOMPASS_PREFERRED
10

Medchemexpress LLC 4,7,10-trioxa-3-siladodecan-12-ol, 2,2,3,3-tetramethyl- | 201037-95-8 | MFCD30471718 | ≥98.0% | 264.43 g/mol | C12H28O4Si | 25 G
SDP

TBDMS-PEG3-OH is a tert-butyldimethylsilyl-protected PEG3 (triethylene glycol) alcohol used as a synthetic building block for chemical synthesis, PEGylation, and drug-delivery research. It is supplied as a colorless to light yellow liquid with high purity and defined molecular properties.

  • High purity suitable for research applications.
  • Colorless to light yellow liquid, easy to handle in synthesis workflows.
  • Defined molecular weight and formula for accurate formulation and calculations.
  • Available in multiple pack sizes for flexible laboratory scale-up.
  • Storage conditions support long-term stability in pure form and in solvent.

ENCOMPASS_PREFERRED
11

Medchemexpress LLC Bis(trimethylsilyl)acetylene | 14630-40-1 | MFCD00008276 | 99.9% | 170.40 g·mol⁻¹ | C8H18Si2 | 5 G
SDP

Bis(trimethylsilyl)acetylene is an organosilicon reagent supplied for laboratory research and organic synthesis applications. It is provided in small lab pack sizes and characterized by confirmed purity, molecular data, and recommended cold storage for long-term stability.

  • Purity 99.87%.
  • Molecular formula C8H18Si2.
  • Molecular weight 170.40 g·mol⁻¹.
  • Appearance: solid below 21°C; liquid above 24°C.
  • Storage: pure form -20°C (up to 3 years); in solvent -80°C (6 months) or -20°C (1 month).
  • Pack size available: 5 g.

ENCOMPASS_PREFERRED
12

Medchemexpress LLC 2-amino-4-(ethylthio)butanoic acid | 67-21-0 | MFCD00063102 | 99.4% | 163.24 g·mol⁻1 | C6H13NO2S | 1 G
SDP

2-Amino-4-(ethylthio)butanoic acid is a methionine-derived amino acid analog provided as a high-purity research reagent for biochemical and pharmacological studies. It is offered as a stable powder with manufacturer-provided documentation to support purity, handling, and safety for laboratory use.

  • High purity (99.36%) suitable for analytical and preparative work.
  • Powder form with recommended storage at -20°C for long-term stability.
  • Solvent storage guidance: -80°C for 6 months, -20°C for 1 month.
  • Applicable as a methionine analog in metabolic and biochemical studies.
  • Supplied with COA and SDS for traceability and safety compliance.

ENCOMPASS_PREFERRED
13

Medchemexpress LLC Boc-NH-PEG5-CH2CH2COOH | 1347750-78-0 | MFCD24539478 | 99.9% | 409.47 g/mol | C18H35NO9 | 100 MG
SDP

Boc-NH-PEG5-CH2CH2COOH is a Boc-protected PEG5 linker containing a protected amine and a terminal ethyl carboxylic acid, intended for use in the synthesis of PROTAC molecules and other linker-dependent conjugates. It is a mid-sized PEG derivative offering predictable reactivity for coupling chemistries and convenient handling in common organic solvents.

  • Boc-protected amine facilitates orthogonal deprotection
  • PEG5 spacer provides flexible linker length
  • Terminal ethyl carboxylic acid enables amide coupling
  • High solubility in DMSO for stock solutions
  • Stable under recommended cold storage conditions

ENCOMPASS_PREFERRED
14

Medchemexpress LLC Hydroxylamine, O-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethyl]- | 1306615-51-9 | 95.0% | 234.25 g/mol | C8H18N4O4 | 5 MG
SDP

Aminooxy-PEG3-azide is a bifunctional PEG linker containing an aminooxy group and an azide handle for oxime ligation and azide-alkyne click chemistry. It is supplied as a liquid and is used for ADC and PROTAC linker synthesis, and for general bioconjugation and small-molecule assembly.

  • Bifunctional: aminooxy and azide reactive groups.
  • Peg3 spacer provides hydrophilicity and flexibility.
  • Suitable for oxime formation with carbonyls and CuAAC click reactions.
  • Purity typically 95.0%.
  • Stable when stored at -20°C; in solvent short-term storage at lower temperatures recommended.
  • Available in small research quantities, such as 5 mg.

ENCOMPASS_PREFERRED
15

Medchemexpress LLC SB290157 trifluoroacetate | 1140525-25-2 | MFCD04974198 | 99.8% | 526.51 g/mol | C24H29F3N4O6 | 25 MG
SDP

SB290157 trifluoroacetate is the trifluoroacetate salt of a C3a receptor antagonist used as a research tool to probe complement C3a-mediated signaling. It is supplied as a high-purity solid with reported molecular weight 526.51 g/mol and an IC50 of 200 nM for C3aR.

  • Potent, selective C3a receptor antagonist (IC50 = 200 nM).
  • High reported purity (~99.8%).
  • Supplied as a solid; available in small vial sizes including 25 mg.
  • Includes solution form option (10 mM in DMSO) for immediate use.
  • Storage recommendations: sealed, away from moisture; in solvent store at -80°C up to 6 months.

ENCOMPASS_PREFERRED