Why does CAS 99-57-0 appear in more than one EU cosmetic annex?

A substance identified by CAS 99-57-0 may appear in multiple EU cosmetic regulation annexes when it is subject to different conditions in different contexts — for example, restricted under Annex III with specific conditions, while also appearing in Annex IV as an approved colorant under separate entry conditions. Each entry must be reviewed individually.

How do I check if my formula contains a substance with CAS 99-57-0?

Use the INCI Checker on CosIng Checker with INCI names, CAS numbers or EC numbers. Paste CAS 99-57-0 to screen it directly, then review every linked annex record and supplier document.

CAS 1 record

CAS 99-57-0

Q: How do I use CAS 99-57-0 for compliance screening?

Cross-reference CAS 99-57-0 against your raw material specification sheets and CoA documents. When it appears in Annex II, verify absence. When it appears in Annex III, verify that concentration limits and product type conditions are met. All annex entries sharing this CAS number are listed on this page.

CAS 99-57-0 matches 1 EU annex record across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 99-57-0

CAS 99-57-0PubChem CID 3613389

2-Amino-4-Nitrophenol

2-Amino-4-nitrophenol is a member of 4-nitrophenols. — ChEBI

IUPAC name: 2-amino-4-nitrophenol

Molecular formula: C6H6N2O3
Molecular weight: 154.12 g/mol
Exact mass: 154.03784206 Da
XLogP3: 1.5
Topological polar surface area: 92.1 Å²
Hydrogen-bond donors: 2
Hydrogen-bond acceptors: 4
Covalent units: 1
Defined stereocentres: 0

Also known as

2-Hydroxy-5-nitroaniline4-Nitro-2-aminophenolPhenol, 2-amino-4-nitro-p-Nitro-o-aminophenolRodol 424-Nitro-2-aminofenol1-Amino-2-hydroxy-5-nitrobenzene1-Hydroxy-2-amino-4-nitrobenzene

16 more reported names

3-Amino-4-hydroxynitrobenzeneNCI-C559585-Nitro-2-hydroxyanilineC.I. 76530CI 76530G501UCI6T94-nitro-2-amino-1-hydroxybenzeneNSC-4664DTXCID00622-amino-p-nitrophenolRefChem:85223202-767-9p-Nitroaminofenol2-Amino-4-nitro-phenol1-Nitro-3-amino-4-hydroxybenzene2-Amino-4-nitrofenol

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:82383
ChEMBL:CHEMBL316992
EPA DTXSID:DTXSID6020062
PubMed:28321044
PubMed:22590392
PubMed:22227702
PubMed:21962688
PubMed:21754773
PubMed:21587534
PubMed:21582157
PubMed:21581902
PubMed:20086194
PubMed:18550424
PubMed:18280784
PubMed:17389084

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 99-57-0

1 total

Annex

Entry

383

2-Amino-4-nitrophenol

202-767-9

How CAS 99-57-0 is used on this site

CAS 99-57-0 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 1 EU annex record shares this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 99-57-0 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.

Frequently asked questions

A substance identified by CAS 99-57-0 may appear in multiple EU cosmetic regulation annexes when it is subject to different conditions in different contexts. For example, a substance might be restricted under Annex III with specific conditions, and the same CAS might also appear in Annex IV as an approved colorant under separate entry conditions. Each entry must be reviewed individually.

Cross-reference the CAS number against your raw material specification sheets and CoA documents. When a CAS appears in Annex II, verify absence. When it appears in Annex III, verify that concentration limits and product type conditions are met in your formulation. All annex entries sharing this CAS number are listed above.

A CAS number is assigned by the Chemical Abstracts Service (USA) and is globally recognised. An EC number is a European Commission identifier from inventories such as EINECS, ELINCS or the NLP list. Both identifiers may appear in EU cosmetic annex entries. Some substances have both, some have only one, and some older entries may have neither.

The INCI Checker accepts ingredient names, CAS numbers and EC numbers. Check this CAS number directly, then verify the result against supplier specification sheets and every linked annex condition.

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Tools & next steps

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