1-Hydroxyethyl 4,5-Diamino Pyrazole Sulfate

1-Hydroxyethyl 4,5-Diamino Pyrazole Sulfate 1
molecular structure · PubChem CID 11673148
AKA: 155601-30-2, 5-Diamino-1-(2-hydroxyethyl)pyrazole sulfate, Colorex WP5, 1H-Pyrazole-1-ethanol, Sulfate (1:1), 1-(2-Hydroxyethyl)-4, 5-diaminopyrazole sulfate, 5-Diamino-1-(2-hydroxyethyl)-1H-pyrazole sulfate, Sulfate (1:1) (salt)
Synthetic
Not Clean
OriginSynthesized from pyrazole derivatives and diamino compounds through organic chemistry reactions. Produced by coupling diaminopyrazole with ethanol and sulfuric acid under controlled conditions.
1H-Pyrazole-1-Ethanol, 4,5 diamino-, sulfate; 1-(2-hydroxyethyl)-1H-pyrazol-4,5-diyldiammoniumsulfate
Formula
C5H12N4O5S
Mol. Weight
240.24
CAS #
155601-30-2
Form
Powder
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
Functions
Hair Dyeing
Colors Hair
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
Skin Irritant in Testing
1 study / 1 irritating (CIR 705)
Eye Irritant in Testing
2 studies / 2 irritating (CIR 705)
Mixed Sensitization Results
3 studies / 1 sensitizing / 2 not sensitizing (CIR 705)
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR