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1-chloro-4-(chloromethoxy)benzene

Also known as: alpha,4-Dichloroanisole, 4-Chlorophenoxymethyl chloride, p-Chlorophenoxymethyl chloride, 1-chloromethoxy-4-chlorobenzene, Benzene, 1-chloro-4-(chloromethoxy)-, ALPHA,4-DICHLOROANISOLE, P-CHLOROPHENOXYMETHYL CHLORIDE

1-chloro-4-(chloromethoxy)benzene (CAS 21151-56-4) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C7H6Cl2O and a molecular weight of 177.02800 g/mol. Key properties include a melting point of 29-30ºC(lit.), a boiling point of 120-124ºC18 mm Hg(lit.), a density of 1.294g/cm3 and a flash point of >110.0 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.

CAS No.
21151-56-4
Jingsj CID
J-33782-6
Molecular Formula
C7H6Cl2O
Molecular Weight
177.02800 g/mol
Category
Ethers
Last updated
11/3/2026
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Physicochemical Properties

Melting Point29-30ºC(lit.)
Boiling Point120-124ºC18 mm Hg(lit.)
Density1.294g/cm3
Flash Point>110.0 °C
Exact Mass175.98000
PSA9.23000
LogP2.91510
Vapor Pressure0.0569mmHg at 25°C
Refractive Indexn20/D 1.552(lit.)

GHS Safety & Compliance

IrritantSignal word: Warning
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Customs & Trade Information

HS Code2909309090
Summary2909309090 other aromatic ethers and their halogenated, sulphonated, nitrated or nitrosated derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 1-chloro-4-(chloromethoxy)benzene?

The CAS number of 1-chloro-4-(chloromethoxy)benzene is 21151-56-4.

What are the molecular formula and molecular weight of 1-chloro-4-(chloromethoxy)benzene?

1-chloro-4-(chloromethoxy)benzene has molecular formula C7H6Cl2O and molecular weight 177.02800 g/mol.

Is 1-chloro-4-(chloromethoxy)benzene hazardous?

1-chloro-4-(chloromethoxy)benzene has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of 1-chloro-4-(chloromethoxy)benzene?

For 1-chloro-4-(chloromethoxy)benzene, Upstream Products: 4-Chlorophenoxyacetic acid, 4-Chlorophenoxyacetyl chloride, 1-Chloro-4-methoxybenzene; Downstream Products: Bis(4-chlorophenoxy)methane.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "1-chloro-4-(chloromethoxy)benzene (CAS 21151-56-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-33782-6 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.