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6-Amino-4-hydroxy-2-naphthalenesulfonic acid


  • Brand : BIOFRON

  • Catalogue Number : BN-O1153

  • Specification : 98%(HPLC)

  • CAS number : 90-51-7

  • Formula : C10H9NO4S

  • Molecular Weight : 239.25

  • PUBCHEM ID : 7022

  • Volume : 5mg

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Catalogue Number


Analysis Method





Molecular Weight



Botanical Source

Structure Type





2-Naphthalenesulfonic acid, 6-amino-4-hydroxy-/6-Amino-4-hydroxy-2-naphthalenesulfonic acid/6-amino-4-hydroxynaphthalene-2-sulfonic acid


6-amino-4-hydroxynaphthalene-2-sulfonic acid


1.6±0.1 g/cm3


Flash Point

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Melting Point


InChl Key


WGK Germany


HS Code Reference

Personal Projective Equipment

Correct Usage

For Reference Standard and R&D, Not for Human Use Directly.

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provides coniferyl ferulate(CAS#:90-51-7) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of coniferyl ferulate are included as well.>> amp version: coniferyl ferulate

No Technical Documents Available For This Product.




To determine the prevalence of preterm delivery and identify the associated risk factors.

This was a five – month prospective case control study of two cohorts of women who had preterm and term deliveries.

Central Hospital (CH), Warri, and Delta State University Teaching Hospital (DELSUTH), Oghara, respectively in southern Nigeria.

522 women which consisted of 174 who presented in preterm labour or with preterm prelabour rupture of membranes as cases and 348 parturient with term deliveries served as controls.

The study was conducted from May 1st 2015 to September 30th 2015. Socio – demographic characteristics, past gynaecological/obstetric factors, maternal/obstetric factors, and fetal outcomes were compared, and associations between these variables and gestational age at delivery were determined.

Main outcome measures
Prevalence of preterm delivery associated clinical and socio-demographic correlates and the fetal salvage rates.

The incidence of preterm birth was 16%. Maternal age (p < 0.002), parity (p < 0.000), booking status (p < 0.000), and socio - economic class (p < 0.000) were significantly associated with preterm births. Others were multiple pregnancy (p < 0.000), pre - eclampsia/eclampsia (p < 0.000), anaemia (p < 0.000), malaria (p < 0.000), UTI (p < 0.012), premature rupture of membrane (p < 0.000) and antepartum haemorrhage (p < 0.000). Fetal salvage rate was zero for extreme preterm neonates and 100% at late preterm. Conclusion Preterm birth was common, with well-defined correlates and predictors. The fetal salvage rates were significantly different across the categories of preterm neonates. Funding The study was self-funded by the authors


Clinical and sociodemographic correlates of preterm deliveries in two tertiary hospitals in southern Nigeria


Mudiaga E Zini1 and Lawrence O Omo-Aghojacorresponding author2

Publish date

2019 Mar;




Air quality is known to be a key factor in affecting the wellbeing and quality of life of the general populous and there is a large body of knowledge indicating that certain underrepresented groups may be overexposed to air pollution. Therefore, a more precise understanding of air pollution exposure as a driving cause of health disparities between and among ethnic and racial groups is necessary. Utilizing 52,613 urban census tracts across the United States, this study investigates age, racial, educational attainment and income differences in exposure to benzene pollution in 1999 as a case. The study examines spatial clustering patterns of these inequities using logistic regression modeling and spatial autocorrelation methods such as the Global Moran’s I index and the Anselin Local Moran’s I index. Results show that the age groups of 0 to 14 and those over 60 years old, individuals with less than 12 years of education, racial minorities including Blacks, American Indians, Asians, some other races, and those with low income were exposed to higher levels of benzene pollution in some census tracts. Clustering analyses stratified by age, education, and race revealed a clear case of disparities in spatial distribution of exposure to benzene pollution across the entire United States. For example, people aged less than 4 years from the western south and the Pacific coastal areas exhibit statistically significant clusters. The findings confirmed that there are geographical-location based disproportionate pattern of exposures to benzene air pollution by various socio-demographic factors across the United States and this type of disproportionate exposure pattern can be effectively detected by a spatial autocorrelation based cluster analysis method. It is suggested that there is a clear and present need for programs and services that will reduce inequities and ultimately improve environmental conditions for all underrepresented groups in the United States.


Spatial Cluster Detection of Air Pollution Exposure Inequities across the United States


Bin Zou, 1 , * Fen Peng, 1 Neng Wan, 2 Keita Mamady, 3 and Gaines J. Wilson 4

Publish date





The aim of this study was to examine the effect of clomiphene citrate [CC] co-administration during the use of exogenous low-dose urinary FSH [uFSH] for induction of ovulation in CC-resistant infertile PCOS women.

In a randomised controlled setting, 174 CC-resistant infertile PCOS women were randomized into two parallel groups; Group I received CC 100 mg/day for 5 days plus uFSH 37.5 IU/day while group II received only uFSH 37.5 IU /day. Subsequent increments of uFSH by 37.5 IU/day were made according to response. Primary outcome was ovulation rate. Secondary outcomes were clinical pregnancy rates, number of follicles, endometrial thickness, and gonadotropins consumption.

Our results have demonstrated that group I compared to group II had significantly higher ovulation rate per intention to treat [ITT] [72.4 % vs. 34.2 %, p < 0.001]. Clinical pregnancy and live birth rates were comparable between the two groups. Group I consumed significantly lower total FSH dose and needed significantly shorter stimulation duration compared to group II. Conclusion CC co-administered during low dose HP uFSH versus uFSH for CC-resistant PCOS yields significantly higher ovulation rate and less consumption of FSH.


Clomiphene resistant PCOS, Chronic low dose FSH, Ovulation induction, PCOS, Randomized controlled trial


Clomiphene Citrate co-treatment with low dose urinary FSH versus urinary FSH for clomiphene resistant PCOS: randomized controlled trial


Mohamad E. Ghanem, Laila A. Elboghdady, Mohamad Hassan, Adel S. Helal, Ahmed Gibreel,corresponding author Maha Houssen, Mohamed E. Shaker, Ibrahiem Bahlol, and Yaser Mesbah

Publish date

2013 Nov;

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