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Plant growth regulators

Dimethipin

Also known as Harvade-5F, 2,3-Dihydro-5,6-dimethyl-1,4-dithiin 1,1,4,4-tetraoxide, 2,3-Dihydro-5,6-dimethyl-1,4-dithiin-1,1,4,4-tetraoxide

CAS 55290-64-7Formula C6H10O4S2Molar mass 210.28 g/molEC 259-572-7
GHS signal word: Warning. Pictograms: Harmful or irritant 2 suppliers listed
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Dimethipin chemical structure, C6H10O4S2, CAS 55290-64-7
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Long white needles from water
Melting point
167 to 169
Density
1.59 g/cm³ at 23 °C
Solubility
In water, 4.6 g/l at 25 °C.
HS code
293499
Category
Plant growth regulators
UN number
UN 2811
Illustrative photo, colourless crystals in an open woven sack in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Dimethipin?

Plain description, key identifiers and synonyms

Dimethipin appears as colorless crystals with a mild odor. Used as a defoliant.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
5,6-dimethyl-2,3-dihydro-1,4-dithiine 1,1,4,4-tetraoxide
CAS number
55290-64-7 CAS number cross-checked
EC number
259-572-7
Molecular formula
C6H10O4S2
UNII
HLV651AHBB
InChIKey
PHVNLLCAQHGNKU-UHFFFAOYSA-N
InChI
InChI=1S/C6H10O4S2/c1-5-6(2)12(9,10)4-3-11(5,7)8/h3-4H2,1-2H3
SMILES (canonical and isomeric)
CC1=C(S(=O)(=O)CCS1(=O)=O)C

Synonyms

  • Harvade-5F
  • 2,3-Dihydro-5,6-dimethyl-1,4-dithiin 1,1,4,4-tetraoxide
  • 2,3-Dihydro-5,6-dimethyl-1,4-dithiin-1,1,4,4-tetraoxide
  • Dimethipin (ANSI:BSI:ISO)
  • 2,3-Dihydro-5,6-dimethyl-1,4-dithiin 1,1,4,4-tetroxide
  • Harvade-5F (9CI)
  • Harvade5F
  • Harvade5F (9CI)
  • UNIN252
  • UBIN 252
  • 2,3Dihydro5,6dimethyl1,4dithiin1,1,4,4tetraoxide
  • 2,3Dihydro5,6dimethyl1,4dithiine 1,1,4,4tetraoxide
  • 1,4Dithiin, 2,3dihydro5,6dimethyl, 1,1,4,4tetraoxide
  • 2,3,-Dihydro-5,6-dimethyl-1,4-dithiin 1,1,4,4-tetraoxide
  • Harvade
  • Oxidimethiin
  • Tetrathiin
  • Tetrathiin (desiccant)
  • 5,6-Dimethyl-2,3-dihydro-1,4-dithiine 1,1,4,4-tetraoxide
  • UBI-N 252
  • 2,3-Dihydro-5,6-dimethyl-1,4-dithiine 1,1,4,4-tetraoxide
  • 1,4-Dithiin, 2,3-dihydro-5,6-dimethyl-, 1,1,4,4-tetraoxide
  • p-Dithiane, 2,3-dehydro-2,3-dimethyl-, tetroxide
  • Oxydimethiin
  • 5,6-Dimethyl-2,3-dihydro-1lambda~6~,4lambda~6~-dithiine-1,1,4,4-tetrone
Show all 28 synonyms
  • Dimethipin 100 |Ig/mL in Methanol
  • Dimethipin 100 microg/mL in Methanol
  • 5,6-Dimethyl-2,3-dihydro-1,4-dithiine 1,1,4,4-tetraoxide #

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Long white needles from waterexp.
Odour
Mild odorexp.
Melting point
167 to 169exp.
Density
1.59 g/cm³ at 23 °Cexp.
Solubility
In water, 4.6 g/l at 25 °C.exp.
Vapour pressure
3.83 × 10⁻⁷ mm Hg at 25 °Cexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
210.28 g/molcalc.
Exact mass
210.0021 Dacalc.
LogP (octanol/water)
0.08calc.
Topological polar surface area
68.28 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
0calc.
Heavy atoms
12calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.67calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=S1(=O)C=CS(=O)(=O)CC1

O=S1(=O)C=CS(=O)(=O)CC1

1 ring, 10 atoms.

15 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
Precautionary statements (5)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2811

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Dimethipin suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 2 suppliers
  • ChemDiv Inc.
    United States, San DiegoUnclaimed profile
    DimethipinGrade, purity and minimum order on request
    Price on request
    View
  • Specs
    Netherlands, ZoetermeerUnclaimed profile
    DimethipinGrade, purity and minimum order on request
    Price on request
    View

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

2 suppliers in 2 countries

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Dimethipin price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Plant growth regulator.

Defoliation of cotton, nursery stock, rubber trees, and vines. Potato haulm desiccant. Reduces seed moisture content at harvest of maize, rice, oilseed rape, flax and sunflowers.

Defoliates dry beans, used as a desiccant for seed of canola.

How it is made

Acetoin + 1,2-ethanedithiol (sulfide formation/oxidation)

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Dimethipin is traded under.

HS 2934.99Indicative HS code

Nucleic acids and their salts, other heterocyclic compounds, not elsewhere classified in heading 2934

World exports in 2024
$26.7B
+15.0% vs 2023, imports $26.3B
2019 to 2024
Top exporters
  1. Ireland26.3%
  2. China15.7%
  3. Singapore10.3%
Top importers
  1. United States24.5%
  2. Germany23.1%
  3. Japan4.5%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Dimethipin is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Dimethipin, based on the data on this page

What is Dimethipin?

Dimethipin appears as colorless crystals with a mild odor. Used as a defoliant.

What is the CAS number of Dimethipin?

The CAS registry number of Dimethipin is 55290-64-7.

What is the molecular formula and weight of Dimethipin?

The molecular formula of Dimethipin is C6H10O4S2 and its molar mass is 210.28 g/mol.

What is Dimethipin used for?

Plant growth regulator. Defoliation of cotton, nursery stock, rubber trees, and vines. Potato haulm desiccant. Reduces seed moisture content at harvest of maize, rice, oilseed rape, flax and sunflowers. Defoliates dry beans, used as a desiccant for seed of canola.

Is Dimethipin hazardous?

Dimethipin carries the GHS signal word "Warning". Main hazards: harmful if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Dimethipin?

Dimethipin is usually classified under HS code 293499 (Nucleic acids and their salts, whether or not chemically defined, other heterocyclic…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Dimethipin?

CompoundList lists 2 suppliers of Dimethipin in Netherlands and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Dimethipin?

Suppliers quote Dimethipin on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Dimethipin

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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