What does the restriction note for 4-NITROGUAIACOL mean?

The restriction field for 4-NITROGUAIACOL reads: II/1251. This is the restriction note from the CosIng inventory. For authoritative conditions and limits, always refer to the linked annex entries.

What other records share CAS 3251-56-7?

CAS 3251-56-7 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

InventoryRef 3153015/10/2010

4-NITROGUAIACOL

Q: How do I check if my formula contains 4-NITROGUAIACOL?

Use the INCI Checker tool on CosIng Checker to paste your full ingredient list and scan it against all EU annex records and allergen flags in one step.

2-methoxy-4-nitrophenol

4-NITROGUAIACOL is linked to 1 EU annex record on this page. Inventory note: II/1251.

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Inventory details for 4-NITROGUAIACOL

INCI name

4-NITROGUAIACOL

Description

2-methoxy-4-nitrophenol

Annex records for 4-NITROGUAIACOL

Annex II Restriction reference

Entry 1251

2-Methoxy-4-nitrophenol (4-Nitroguaiacol) and its salts, when used as a substance in hair dye produ…

CAS: 3251-56-7

EC: 221-839-0

Key data

CAS

3251-56-7

221-839-0

Restriction

II/1251

Function

HAIR DYEING

How 4-NITROGUAIACOL appears in the CosIng inventory

The CosIng inventory lists 4-NITROGUAIACOL as a cosmetic ingredient and this page links it to 1 annex record. The inventory entry captures names and identifiers, while the annex record shows where the substance is prohibited, restricted or positively listed in EU cosmetics law.

4-NITROGUAIACOL is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

4-NITROGUAIACOL appears in the EU CosIng inventory and has linked annex records. Check the annex records above for applicable restrictions, concentration limits and conditions of use. Annex II listing means prohibited; Annex III means restricted; Annexes IV, V and VI mean permitted under specified conditions.

The restriction field for 4-NITROGUAIACOL reads: "II/1251". This is the restriction note recorded in the CosIng inventory for this ingredient. For authoritative conditions and limits, always refer to the linked annex entries above.

According to the EU CosIng inventory, 4-NITROGUAIACOL carries the following function designation(s):

HAIR DYEING

CAS 3251-56-7 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

View CAS records

Use the INCI Checker tool to paste your full ingredient list and scan it against all EU annex records and allergen flags in one step.

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Source note for 4-NITROGUAIACOL

This page combines the CosIng inventory entry for 4-NITROGUAIACOL with 1 linked Annex II–VI record from the local dataset built from public European Commission cosmetic ingredient materials.

Use this inventory page to research 4-NITROGUAIACOL and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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Tools & next steps

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