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Dimethyl Pimelimidate Dihydrochloride
CAS: 58537-94-3 PubChem CID: 11402688 Formula: C₉H₁₈N₂O₂·2HCl Molecular Weight: 259.17

≥98%

In Stock Item #: D155696

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Technical Identifiers

IUPAC Name

dimethyl heptanediimidate;dihydrochloride

SMILES

COC(=N)CCCCCC(=N)OC.Cl.Cl

InChIKey
LRHXBHUTQWIZTN-UHFFFAOYSA-N

InChI

1S/C9H18N2O2.2ClH/c1-12-8(10)6-4-3-5-7-9(11)13-2;;/h10-11H,3-7H2,1-2H3;2*1H

Synonyms
Dimethyl pimelimidate dihydrochloride | Dimethyl pimelimidate dihydrochloride, >=99.0% (AT) | Dimethyl Pimelimidate D...
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DNP-PEG4-NHS ester
CAS: 858126-78-0 Formula: C₂₁H₂₈N₄O₁₂ Molecular Weight: 528.47

≥95%

In Stock Item #: D336181

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IUPAC Name

(2,5-dioxopyrrolidin-1-yl) 3-[2-[2-[2-[2-(2,4-dinitroanilino)ethoxy]ethoxy]ethoxy]ethoxy]propanoate

SMILES

C1CC(=O)N(C1=O)OC(=O)CCOCCOCCOCCOCCNC2=C(C=C(C=C2)[N+](=O)[O-])[N+](=O)[O-]

InChIKey
OZBOCCBKQAMCSA-UHFFFAOYSA-N

InChI

1S/C21H28N4O12/c26-19-3-4-20(27)23(19)37-21(28)5-7-33-9-11-35-13-14-36-12-10-34-8-6-22-17-2-1-16(24(29)30)15-18(17)25(31)32/h1-2,15,22H,3-14H2
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DBCO-NHCO-PEG5-NHS ester
CAS: 1378531-80-6 Formula: C₃₆H₄₃N₃O₁₁ Molecular Weight: 693.74

≥98%

In Stock Item #: D338360

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IUPAC Name

(2,5-dioxopyrrolidin-1-yl) 3-[2-[2-[2-[2-[3-[[3-(2-azatricyclo[10.4.0.04,9]hexadeca-1(16),4,6,8,12,14-hexaen-10-yn-2-yl)-3-oxopropyl]amino]-3-oxoproposhow more

SMILES

C1CC(=O)N(C1=O)OC(=O)CCOCCOCCOCCOCCOCCC(=O)NCCC(=O)N2CC3=CC=CC=C3C#CC4=CC=CC=C42

InChIKey
VGKLBFTYZNBCQG-UHFFFAOYSA-N

InChI

1S/C36H43N3O11/c40-32(37-16-13-33(41)38-27-30-7-2-1-5-28(30)9-10-29-6-3-4-8-31(29)38)14-17-45-19-21-47-23-25-49-26-24-48-22-20-46-18-15-36(44)50-39-34show more

Synonyms
DBCO-PEG5-NHS ester | DBCO-PEG(5)-NHS | DBCO-NH-PEG5-NHS ester
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Bis-PEG2-acid
CAS: 19364-66-0 Formula: C₈H₁₄O₆ Molecular Weight: 206.19

≥95%

In Stock Item #: B339051

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IUPAC Name

3-[2-(2-carboxyethoxy)ethoxy]propanoic acid

SMILES

C(COCCOCCC(=O)O)C(=O)O

InChIKey
BOXWYBCUJGWEOJ-UHFFFAOYSA-N

InChI

1S/C8H14O6/c9-7(10)1-3-13-5-6-14-4-2-8(11)12/h1-6H2,(H,9,10)(H,11,12)

Synonyms
3,3'-(ETHANE-1,2-DIYLBIS(OXY))DIPROPANOIC ACID | LCZC1128 | Bis-PEG(2)-acid | EN300-6486786 | SY272991 | 3-[2-(2-CARB...
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di-Boc-cystamine
CAS: 67385-10-8 Formula: C₁₄H₂₈N₂O₄S₂ Molecular Weight: 352.51

≥98%

In Stock Item #: D340481

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IUPAC Name

tert-butyl N-[2-[2-[(2-methylpropan-2-yl)oxycarbonylamino]ethyldisulfanyl]ethyl]carbamate

SMILES

CC(C)(C)OC(=O)NCCSSCCNC(=O)OC(C)(C)C

InChIKey
HBTMWZADMHBLMY-UHFFFAOYSA-N

InChI

1S/C14H28N2O4S2/c1-13(2,3)19-11(17)15-7-9-21-22-10-8-16-12(18)20-14(4,5)6/h7-10H2,1-6H3,(H,15,17)(H,16,18)

Synonyms
DTXSID00393924 | [2-(2-tert-Butoxycarbonylamino-ethyldisulfanyl)-ethyl]-carbamic acid tert-butyl ester | Di-tert-Buty...
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4-(2-Chloropropionyl)phenylacetic acid
CAS: 84098-73-7 Formula: C₁₁H₁₁ClO₃ Molecular Weight: 226.66

≥95%

Out of Stock Item #: C332248

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IUPAC Name

2-[4-(2-chloropropanoyl)phenyl]acetic acid

SMILES

CC(C(=O)C1=CC=C(C=C1)CC(=O)O)Cl

InChIKey
SYKQUPRADSJCQY-UHFFFAOYSA-N

InChI

1S/C11H11ClO3/c1-7(12)11(15)9-4-2-8(3-5-9)6-10(13)14/h2-5,7H,6H2,1H3,(H,13,14)

Synonyms
FT-0641939 | 2-[4-(2-chloro-1-oxopropyl)phenyl]acetic acid | 2-(4-(2-Chloropropanoyl)phenyl)acetic acid | 4-(2-chloro...
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3-Maleimidopropionic Acid Hydrazonium, Trifluoroacetate
CAS: 359436-61-6 Formula: C₉H₁₀F₃N₃O₅ Molecular Weight: 296.18

≥95%

In Stock Item #: M332246

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IUPAC Name

3-(2,5-dioxopyrrol-1-yl)propanehydrazide;2,2,2-trifluoroacetic acid

SMILES

C1=CC(=O)N(C1=O)CCC(=O)NN.C(=O)(C(F)(F)F)O

InChIKey
BADCXPKRBUEEMA-UHFFFAOYSA-N

InChI

1S/C7H9N3O3.C2HF3O2/c8-9-5(11)3-4-10-6(12)1-2-7(10)13;3-2(4,5)1(6)7/h1-2H,3-4,8H2,(H,9,11);(H,6,7)

Synonyms
3-Maleimidopropionic Acid Hydrazonium Trifluoroacetate | 3-Maleimidopropionic Acid Hydrazonium, Trifluoroacetate | 3-...
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Sulfo-Cy3 DBCO
CAS: 1782950-79-1 PubChem CID: 146680152 Formula: C₅₀H₅₄N₄O₁₁S₃ Molecular Weight: 983.18

≥95%

In Stock Item #: S335279

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IUPAC Name

2-[(E,3E)-3-[1-[6-[[3-(2-azatricyclo[10.4.0.04,9]hexadeca-1(16),4,6,8,12,14-hexaen-10-yn-2-yl)-3-oxopropyl]amino]-6-oxohexyl]-3,3-dimethyl-5-sulfoindoshow more

SMILES

CC1(C2=C(C=CC(=C2)S(=O)(=O)[O-])[N+](=C1C=CC=C3C(C4=C(N3CCCCCC(=O)NCCC(=O)N5CC6=CC=CC=C6C#CC7=CC=CC=C75)C=CC(=C4)S(=O)(=O)O)(C)C)CCCS(=O)(=O)O)C

InChIKey
ALLGTQOHAQKUOH-UHFFFAOYSA-N

InChI

1S/C50H54N4O11S3/c1-49(2)40-32-38(67(60,61)62)23-25-43(40)52(45(49)18-12-19-46-50(3,4)41-33-39(68(63,64)65)24-26-44(41)53(46)30-13-31-66(57,58)59)29-1show more

Synonyms
DBCO-Cy3 | DBCO-Sulfo-Cy3
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Biotin-PEG3-NHS ester
CAS: 1253286-56-4 Formula: C₂₃H₃₆N₄O₉S Molecular Weight: 544.62

≥95%

In Stock Item #: B346583

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IUPAC Name

(2,5-dioxopyrrolidin-1-yl) 3-[2-[2-[2-[5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoylamino]ethoxy]ethoxy]ethoxy]proshow more

SMILES

C1CC(=O)N(C1=O)OC(=O)CCOCCOCCOCCNC(=O)CCCCC2C3C(CS2)NC(=O)N3

InChIKey
QIAUJZJSFIYGMH-HOIFWPIMSA-N

InChI

1S/C23H36N4O9S/c28-18(4-2-1-3-17-22-16(15-37-17)25-23(32)26-22)24-8-10-34-12-14-35-13-11-33-9-7-21(31)36-27-19(29)5-6-20(27)30/h16-17,22H,1-15H2,(H,24show more
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α-Amine-ω-propionic acid octaethylene glycol
CAS: 756526-04-2 Formula: C₁₉H₃₉NO₁₀ Molecular Weight: 441.52

≥98%

In Stock Item #: A122172

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IUPAC Name

3-[2-[2-[2-[2-[2-[2-[2-(2-aminoethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoic acid

SMILES

C(COCCOCCOCCOCCOCCOCCOCCOCCN)C(=O)O

InChIKey
YLKOHZCQTVYVDB-UHFFFAOYSA-N

InChI

1S/C19H39NO10/c20-2-4-24-6-8-26-10-12-28-14-16-30-18-17-29-15-13-27-11-9-25-7-5-23-3-1-19(21)22/h1-18,20H2,(H,21,22)

Synonyms
Amino-PEG8-COOH | 3-[2-[2-[2-[2-[2-[2-[2-(2-aminoethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoic ac...
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O-(2-Aminoethyl)polyethylene glycol 3,000
CAS: 32130-27-1 PubChem CID: 254751062 Formula: NH₂(CH₂CH₂O)nH

In Stock Item #: O347701

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Synonyms
Aminopolyethylene glycol 3,000
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O-(2-Aminoethyl)-O′-[2-(Boc-amino)ethyl]octaethylene glycol
CAS: 890091-43-7 Formula: C₂₅H₅₂N₂O₁₁ Molecular Weight: 556.69

≥97%

Out of Stock Item #: A122204

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IUPAC Name

tert-butyl N-[2-[2-[2-[2-[2-[2-[2-[2-[2-(2-aminoethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethyl]carbamate

SMILES

CC(C)(C)OC(=O)NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCN

InChIKey
RTTGVFBQUXJWJG-UHFFFAOYSA-N

InChI

1S/C25H52N2O11/c1-25(2,3)38-24(28)27-5-7-30-9-11-32-13-15-34-17-19-36-21-23-37-22-20-35-18-16-33-14-12-31-10-8-29-6-4-26/h4-23,26H2,1-3H3,(H,27,28)

Synonyms
Boc-PEG-amine (n=8) | AKOS040741402 | t-Boc-N-amido-PEG9-Amine | WS-01853 | Boc-N-amido-PEG9-Amine | DTXSID10405128 |...

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Frequently Asked Questions

How do I choose Crosslinkers for my workflow?

Match reactivity, spacer length, photophysical properties, and conjugation chemistry to your target. Consider water solubility, cell permeability, and downstream detection method.

What specifications matter for Crosslinkers?

Functional group reactivity, purity (HPLC), spacer length, optical properties (excitation/emission for fluorophores), water solubility, and storage stability. Light sensitivity is critical for photoactivatable compounds.

Are bifunctional and bioorthogonal variants available?

Yes. Hetero-bifunctional linkers, click chemistry reagents (azide/alkyne), and bioorthogonal handles are available for two-step labeling and conjugation workflows.

How should light-sensitive compounds be handled?

Store light-sensitive products in amber containers, protected from ambient light. Many products are stable at -20°C in the dark. Use minimal light exposure during weighing and dilution.

Crosslinkers are used to stabilize interactions, map proximity, build conjugates, and support labeling workflows in proteins and other biomolecules. Researchers usually compare reactive groups, spacer length, cleavability, solubility, target compatibility, and whether the experiment needs permanent linkage, reversible capture, or structural probing. This category is especially useful for designing interaction, conjugation, and structural-biology workflows that depend on controlled linkage chemistry. It complements biotinylation reagents, PEG linkers, and protein-interaction research pages.